A180390 Number of permutations of 1..n with the permutation and its inverse having a different number of maxima

0, 0, 2, 8, 46, 348, 2556, 21568, 207226, 2139108, 24243696, 299757088, 3981465548, 56839765304

Offset

1,3

Links

Table of n, a(n) for n=1..14.

Crossrefs

Sequence in context: A128085 A052801 A294784 * A300696 A074599 A007289

Adjacent sequences: A180387 A180388 A180389 * A180391 A180392 A180393

Keyword

nonn

Author

R. H. Hardin Sep 01 2010

Status

approved