A130660 1/16 the number of permutations of 0..n having exactly 4 maxima.

0, 0, 0, 0, 0, 0, 17, 496, 8576, 115072, 1328336, 13899904, 135927040, 1266360320, 11385790720, 99682672640, 855303553024, 7226263666688, 60329459699712, 499027284295680

Offset

0,7

Links

Table of n, a(n) for n=0..19.

Formula

a(n) = A000517(n+1)/16. - R. J. Mathar, Mar 01 2015

Crossrefs

Cf. A100575.

Sequence in context: A173148 A142368 A109305 * A185659 A012792 A012232

Adjacent sequences: A130657 A130658 A130659 * A130661 A130662 A130663

Keyword

nonn

Author

R. H. Hardin, Aug 11 2007

Status

approved