A147976 a(n) = 5^n-4^n-3^n-2^n-1.

-3, -5, -5, 25, 271, 1825, 10735, 59425, 318271, 1670785, 8656975, 44454625, 226827871, 1151991745, 5830280815, 29429454625, 148249811071, 745630312705, 3745590106255, 18797445635425, 94264432179871, 472428649241665

Offset

1,1

Links

Table of n, a(n) for n=1..22.

Formula

G.f.: x*(3-40*x+185*x^2-350*x^3+226*x^4)/((x-1)*(4*x-1)*(3*x-1)*(2*x-1)*(5*x-1)). [Maksym Voznyy (voznyy(AT)mail.ru), Jul 26 2009]

Mathematica

lst={}; Do[p=5^n-4^n-3^n-2^n-1^n; AppendTo[lst, p], {n, 0, 5!}]; lst
Table[5^n-4^n-3^n-2^n-1, {n, 0, 30}] (* Harvey P. Dale, Jul 27 2015 *)

Crossrefs

Cf. A147975-A147979.

Sequence in context: A370553 A200771 A072624 * A019247 A320433 A165142

Adjacent sequences: A147973 A147974 A147975 * A147977 A147978 A147979

Keyword

sign,easy

Author

Vladimir Joseph Stephan Orlovsky, Nov 18 2008

Extensions

G.f. proposed by Maksym Voznyy checked and corrected by R. J. Mathar, Sep 16 2009.

Status

approved