Total number of 231 patterns in all heapable permutations of length n.
A391777
Total number of 231 patterns in all heapable permutations of length n.
Terms
- a(0) =0a(1) =0a(2) =0a(3) =0a(4) =1a(5) =11a(6) =107a(7) =1038a(8) =10522a(9) =113302a(10) =1302812a(11) =16015199a(12) =210235874a(13) =2941323511a(14) =43751523889a(15) =690175187973
External references
- oeis: A391777