A242657 Mahonian numbers T(n,7) (cf. A008302).

15, 101, 359, 961, 2191, 4489, 8504, 15159, 25728, 41926, 66013, 100913, 150349, 218995, 312646, 438407, 604902, 822504, 1103587, 1462801, 1917371, 2487421, 3196324, 4071079, 5142716, 6446730, 8023545, 9919009, 12184921, 14879591, 18068434, 21824599, 26229634, 31374188, 37358751, 44294433, 52303783, 61521649

Offset

5,1

Comments

45 years ago this was A000712, but it was dropped during the preparation of the 1973 Handbook of Integer Sequences.

Links

Table of n, a(n) for n=5..42.

Maple

g := proc(n, k) option remember; if k=0 then return(1) else if (n=1 and k=1) then return(0) else if (k<0 or k>binomial(n, 2)) then return(0) else g(n-1, k)+g(n, k-1)-g(n-1, k-n) end if end if end if end proc;
[seq(g(n, 7), n=5..40)];

Crossrefs

Cf. A008302.

Sequence in context: A034266 A087661 A319777 * A163717 A111370 A093739

Adjacent sequences: A242654 A242655 A242656 * A242658 A242659 A242660

Keyword

nonn

Author

N. J. A. Sloane, May 30 2014

Status

approved