Half the number of permutations of 0..n with a zero n-th difference.
A131502
Half the number of permutations of 0..n with a zero n-th difference.
Terms
- a(0) =0a(1) =0a(2) =1a(3) =1a(4) =8a(5) =3a(6) =136a(7) =29a(8) =928a(9) =942a(10) =66496a(11) =6175a(12) =2785856a(13) =205678a(14) =11122048
External references
- oeis: A131502