Total number of 213 patterns in all heapable permutations of length n.
A391697
Total number of 213 patterns in all heapable permutations of length n.
Terms
- a(0) =0a(1) =0a(2) =0a(3) =0a(4) =1a(5) =11a(6) =110a(7) =1080a(8) =11047a(9) =119531a(10) =1378337a(11) =16965766a(12) =222795401a(13) =3116148625a(14) =46318941935a(15) =729946419128
External references
- oeis: A391697