A017646 a(n) = (12*n + 10)^6.

1000000, 113379904, 1544804416, 9474296896, 38068692544, 117649000000, 304006671424, 689869781056, 1418519112256, 2699554153024, 4826809000000, 8198418170944, 13339032325696, 20924183895616, 31806802621504, 47045881000000, 67937289638464, 96046742518336, 133244912166976

Offset

0,1

Links

Paolo Xausa, Table of n, a(n) for n = 0..10000

Index entries for linear recurrences with constant coefficients, signature (7,-21,35,-35,21,-7,1).

Formula

From Harvey P. Dale, Aug 27 2011: (Start)

a(n) = 7*a(n-1)- 21*a(n-2)+35*a(n-3)-35*a(n-4)+21*a(n-5)-7*a(n-6)+a(n-7).

G.f.: -((64*(15625+1662186*x+12064767*x^2+15728812*x^3+4003287*x^4+ 117642*x^5+x^6))/(x-1)^7). (End)

Example

a(n) = A001014(A017641(n)). - Michel Marcus, Aug 25 2025

Mathematica

(12Range[0, 30]+10)^6 (* Harvey P. Dale, Aug 27 2011 *)

Crossrefs

Cf. A001014, A017641.

Sequence in context: A017178 A017274 A017514 * A227138 A227111 A227137

Adjacent sequences: A017643 A017644 A017645 * A017647 A017648 A017649

Keyword

nonn,easy

Author

N. J. A. Sloane

Status

approved