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

Offset: 1

Author

N. J. A. Sloane

Keywords

• nonn
• easy

Links

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

Programs

Mathematica

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

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.