Total number of 321 patterns in all heapable permutations of length n.
A392533
Total number of 321 patterns in all heapable permutations of length n.
Terms
- a(0) =0a(1) =0a(2) =0a(3) =0a(4) =0a(5) =3a(6) =40a(7) =480a(8) =5513a(9) =65051a(10) =800679a(11) =10384967a(12) =142357706a(13) =2064273113a(14) =31644682654a(15) =512196648751
External references
- oeis: A392533