A047669 - OEIS

A047669

Row 5 of array in A047666.

5, 26, 95, 276, 681, 1486, 2947, 5416, 9357, 15362, 24167, 36668, 53937, 77238, 108043, 148048, 199189, 263658, 343919, 442724, 563129, 708510, 882579, 1089400, 1333405, 1619410, 1952631, 2338700, 2783681, 3294086, 3876891, 4539552, 5290021, 6136762, 7088767

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OFFSET

1,1

LINKS

Table of n, a(n) for n=1..35.

Index entries for linear recurrences with constant coefficients, signature (6,-15,20,-15,6,-1)

FORMULA

a(n) = (n/15) * (2n^4 + 30n^2 + 43).

G.f.: x*(5*x^4-4*x^3+14*x^2-4*x+5)/(x-1)^6.

MATHEMATICA

Table[(n/15)(2n^4+30n^2+43), {n, 40}] (* Harvey P. Dale, May 25 2023 *)

CROSSREFS