Number of permutations of n elements divided by the number of ternary heaps on n+1 elements.

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =2a(5) =3a(6) =4a(7) =8a(8) =12a(9) =16a(10) =32a(11) =48a(12) =64a(13) =160a(14) =288a(15) =448a(16) =1024a(17) =1728a(18) =2560a(19) =5632a(20) =9216a(21) =13312a(22) =33280a(23) =59904a(24) =93184a(25) =212992a(26) =359424a(27) =532480a(28) =1171456a(29) =1916928