Total number of 321 patterns in the set of permutations avoiding 123.

A217711

Total number of 321 patterns in the set of permutations avoiding 123.

Terms

    a(0) =1a(1) =16a(2) =144a(3) =1016a(4) =6271a(5) =35584a(6) =190628a(7) =979496a(8) =4876530a(9) =23686560a(10) =112796176a(11) =528495600a(12) =2442949979a(13) =11163970432a(14) =50520351612a(15) =226688100104

External references