A017286 a(n) = (10*n + 1)^6.

1, 1771561, 85766121, 887503681, 4750104241, 17596287801, 51520374361, 128100283921, 282429536481, 567869252041, 1061520150601, 1870414552161, 3138428376721, 5053913144281, 7858047974841, 11853911588401, 17416274304961

Offset

0,2

Links

Vincenzo Librandi, 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

G.f.: (1 + 1771554*x + 73365215*x^2 + 324343580*x^3 + 276662415*x^4 + 43325794*x^5 + 531441*x^6)/(1-x)^7. - Bruno Berselli, Jul 30 2011

Mathematica

(10 Range[0, 20]+1)^6 (* or *) LinearRecurrence[{7, -21, 35, -35, 21, -7, 1}, {1, 1771561, 85766121, 887503681, 4750104241, 17596287801, 51520374361}, 20] (* Harvey P. Dale, Feb 08 2020 *)

Prog

(Magma) [(10*n+1)^6: n in [0..20]]; // Vincenzo Librandi, Jul 30 2011
(PARI) for(n=0, 16, print1((10*n+1)^6", ")); \\ Bruno Berselli, Jul 30 2011

Crossrefs

Sequence in context: A237148 A203941 A224591 * A017394 A017658 A234671

Adjacent sequences: A017283 A017284 A017285 * A017287 A017288 A017289

Keyword

nonn,easy

Author

N. J. A. Sloane

Status

approved