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 A242656 Mahonian numbers T(n,6) (cf. A008302). 1
 1, 20, 90, 259, 602, 1230, 2298, 4015, 6655, 10569, 16198, 24087, 34900, 49436, 68646, 93651, 125761, 166495, 217602, 281083, 359214, 454570, 570050, 708903, 874755, 1071637, 1304014, 1576815, 1895464, 2265912, 2694670, 3188843, 3756165, 4405035, 5144554, 5984563, 6935682 (list; graph; refs; listen; history; text; internal format)
 OFFSET 4,2 COMMENTS 45 years ago this was A000711, but it was dropped during the preparation of the 1973 Handbook of Integer Sequences. LINKS 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, 6), n=4..40)]; CROSSREFS Cf. A008302. Sequence in context: A213839 A264302 A220200 * A264851 A225882 A281768 Adjacent sequences:  A242653 A242654 A242655 * A242657 A242658 A242659 KEYWORD nonn AUTHOR N. J. A. Sloane, May 30 2014 STATUS approved

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Last modified January 21 15:00 EST 2019. Contains 319350 sequences. (Running on oeis4.)