A017359 a(n) = (10*n + 7)^7.

823543, 410338673, 10460353203, 94931877133, 506623120463, 1954897493193, 6060711605323, 16048523266853, 37725479487783, 80798284478113, 160578147647843, 300124211606973, 532875860165503

Offset

0,1

Comments

The penultimate digit of a(n) is period 10, repeat (4,7,0,3,6,9,2,5,8,1) = A131579(n+8). - Paul Curtz, Mar 07 2011

Links

Vincenzo Librandi, Table of n, a(n) for n = 0..10000

Index entries for linear recurrences with constant coefficients, signature (8, -28, 56, -70, 56, -28, 8, -1).

Formula

From G. C. Greubel, Nov 08 2018: (Start)

G.f.: (823543 + 403750329*x + 7200703023*x^2 + 22692415945*x^3 + 17136675405*x^4 + 2902898547*x^5 + 62731021*x^6 + 2187*x^7)/(1-x)^8.

E.g.f.: (823543 +409515130*x +4820249700*x^2 +10796835000*x^3 + 7834050000*x^4 +2237900000*x^5 +259000000*x^6 + 10000000*x^7)*exp(x). (End)

Mathematica

Table[(10*n + 7)^7, {n, 0, 20}] (* G. C. Greubel, Nov 08 2018 *)

Prog

(Magma) [(10*n+7)^7: n in [0..20]]; // Vincenzo Librandi, Aug 14 2011
(PARI) vector(20, n, n--; (10*n + 7)^7) \\ G. C. Greubel, Nov 08 2018

Crossrefs

Sequence in context: A016987 A017155 A017251 * A017479 A017611 A112443

Adjacent sequences: A017356 A017357 A017358 * A017360 A017361 A017362

Keyword

nonn,easy

Author

N. J. A. Sloane

Status

approved