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A017224 a(n) = (9*n + 5)^4. 1
625, 38416, 279841, 1048576, 2825761, 6250000, 12117361, 21381376, 35153041, 54700816, 81450625, 116985856, 163047361, 221533456, 294499921, 384160000, 492884401, 623201296, 777796321, 959512576 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

LINKS

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

Index entries for linear recurrences with constant coefficients, signature (5, -10, 10, -5, 1).

FORMULA

a(n) = 5*a(n-1) - 10*a(n-2) + 10*a(n-3) - 5*a(n-4) + a(n-5); a(0)=625, a(1)=38416, a(2)=279841, a(3)=1048576, a(4)=2825761. - Harvey P. Dale, Apr 27 2016

G.f.: (-625 - 35291*x - 94011*x^2 - 27281*x^3 - 256*x^4)/(x-1)^5. - Harvey P. Dale, Apr 27 2016

MATHEMATICA

(9*Range[0, 20]+5)^4 (* or *) LinearRecurrence[{5, -10, 10, -5, 1}, {625, 38416, 279841, 1048576, 2825761}, 20] (* Harvey P. Dale, Apr 27 2016 *)

PROG

(MAGMA) [(9*n+5)^4: n in [0..35]] ; // Vincenzo Librandi, Jul 24 2011

CROSSREFS

Cf. A000583 (n^4), A017221 (9*n+5).

Sequence in context: A080175 A017128 A180259 * A106321 A017332 A167039

Adjacent sequences:  A017221 A017222 A017223 * A017225 A017226 A017227

KEYWORD

nonn,easy

AUTHOR

N. J. A. Sloane

STATUS

approved

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Last modified December 5 23:38 EST 2021. Contains 349558 sequences. (Running on oeis4.)