A017607 (12n+7)^3.

343, 6859, 29791, 79507, 166375, 300763, 493039, 753571, 1092727, 1520875, 2048383, 2685619, 3442951, 4330747, 5359375, 6539203, 7880599, 9393931, 11089567, 12977875, 15069223, 17373979, 19902511

Offset: 0

Author

N. J. A. Sloane

Keywords

• nonn
• easy

Links

• Matthew House, Table of n, a(n) for n = 0..10000
• Index entries for linear recurrences with constant coefficients, signature (4,-6,4,-1).

Formula

G.f.: (343+5487*x+4413*x^2+125*x^3)/(1-x)^4.