Av(12345, 12354, 12435, 13425, 23415)
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Counting Sequence
1, 1, 2, 6, 24, 115, 619, 3612, 22386, 145454, 981943, 6842225, 48965149, 358478993, 2676594500, ...
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This specification was found using the strategy pack "Col Placements Tracked Fusion" and has 24 rules.

Found on January 22, 2022.

Finding the specification took 9 seconds.

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\(\begin{align*} F_{0}\! \left(x \right) &= F_{1}\! \left(x \right)+F_{2}\! \left(x \right)\\ F_{1}\! \left(x \right) &= 1\\ F_{2}\! \left(x \right) &= F_{3}\! \left(x \right) F_{4}\! \left(x \right)\\ F_{3}\! \left(x \right) &= x\\ F_{4}\! \left(x \right) &= F_{5}\! \left(x , 1\right)\\ F_{5}\! \left(x , y\right) &= F_{1}\! \left(x \right)+F_{6}\! \left(x , y\right)+F_{8}\! \left(x , y\right)\\ F_{6}\! \left(x , y\right) &= F_{3}\! \left(x \right) F_{7}\! \left(x , y\right)\\ F_{7}\! \left(x , y\right) &= \frac{y F_{5}\! \left(x , y\right)-F_{5}\! \left(x , 1\right)}{-1+y}\\ F_{8}\! \left(x , y\right) &= F_{10}\! \left(x , y\right) F_{9}\! \left(x , y\right)\\ F_{9}\! \left(x , y\right) &= y x\\ F_{10}\! \left(x , y\right) &= F_{11}\! \left(x , 1, y\right)\\ F_{11}\! \left(x , y , z\right) &= F_{1}\! \left(x \right)+F_{12}\! \left(x , y , z\right)+F_{14}\! \left(x , y , z\right)+F_{21}\! \left(x , z , y\right)\\ F_{12}\! \left(x , y , z\right) &= F_{13}\! \left(x , y , z\right) F_{3}\! \left(x \right)\\ F_{13}\! \left(x , y , z\right) &= \frac{y z F_{11}\! \left(x , y , z\right)-F_{11}\! \left(x , \frac{1}{z}, z\right)}{y z -1}\\ F_{14}\! \left(x , y , z\right) &= F_{15}\! \left(x , y z , z\right)\\ F_{16}\! \left(x , y , z\right) &= F_{1}\! \left(x \right)+F_{15}\! \left(x , y , z\right)+F_{17}\! \left(x , y , z\right)+F_{19}\! \left(x , z , y\right)\\ F_{16}\! \left(x , y , z\right) &= \frac{y F_{5}\! \left(x , y\right)-F_{5}\! \left(x , z\right) z}{y -z}\\ F_{17}\! \left(x , y , z\right) &= F_{18}\! \left(x , y , z\right) F_{3}\! \left(x \right)\\ F_{18}\! \left(x , y , z\right) &= \frac{F_{16}\! \left(x , y , z\right) y -F_{16}\! \left(x , 1, z\right)}{-1+y}\\ F_{19}\! \left(x , y , z\right) &= F_{20}\! \left(x , z , y\right) F_{9}\! \left(x , y\right)\\ F_{20}\! \left(x , y , z\right) &= \frac{-F_{11}\! \left(x , 1, z\right) z +F_{11}\! \left(x , \frac{y}{z}, z\right) y}{y -z}\\ F_{21}\! \left(x , y , z\right) &= F_{22}\! \left(x , y , z\right)\\ F_{22}\! \left(x , y , z\right) &= F_{11}\! \left(x , z , y\right) F_{23}\! \left(x , y\right) F_{9}\! \left(x , y\right)\\ F_{23}\! \left(x , y\right) &= F_{1}\! \left(x \right)+F_{9}\! \left(x , y\right)\\ \end{align*}\)