A180388 Number of permutations of 1..n with number of rises (p(i+1)>p(i)) different from number of rises in the inverse permutation.

0, 0, 0, 0, 2, 24, 228, 2088, 19732, 197890, 2131060, 24729108, 309027560, 4148115048, 59611031304, 913915160628, 14897443573244, 257369478424890, 4698494631208500, 90393611677083892, 1828153614233855024, 38778554791649355232, 860921156414834534368

Offset

0,5

Links

Vaclav Kotesovec, Table of n, a(n) for n = 0..200

Crossrefs

a(n) + A180389(n) = n! = A000142(n).

Sequence in context: A302444 A121213 A147538 * A288270 A221653 A219205

Adjacent sequences: A180385 A180386 A180387 * A180389 A180390 A180391

Keyword

nonn

Author

Leroy Quet, D. S. McNeil and R. H. Hardin in the Sequence Fans Mailing List Sep 01 2010

Extensions

More terms from Vaclav Kotesovec, Jun 10 2015

a(0)=0 prepended by Alois P. Heinz, Jun 10 2015

Status

approved