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A016965 a(n) = (6*n + 4)^9. 4
262144, 1000000000, 68719476736, 1207269217792, 10578455953408, 60716992766464, 262144000000000, 922190162669056, 2779905883635712, 7427658739644928, 18014398509481984, 40353607000000000, 84590643846578176, 167619550409708032, 316478381828866048, 572994802228616704 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 0..1000

Index entries for linear recurrences with constant coefficients, signature (10,-45,120,-210,252,-210,120,-45,10,-1).

FORMULA

From Amiram Eldar, Mar 31 2022: (Start)

a(n) = A016957(n)^9 = A016958(n)^3.

a(n) = 2^9*A016797(n).

Sum_{n>=0} 1/a(n) = 9841*zeta(9)/10077696 - 809*Pi^9/(14285134080*sqrt(3)). (End)

MATHEMATICA

(6*Range[0, 20]+4)^9 (* or *) LinearRecurrence[{10, -45, 120, -210, 252, -210, 120, -45, 10, -1}, {262144, 1000000000, 68719476736, 1207269217792, 10578455953408, 60716992766464, 262144000000000, 922190162669056, 2779905883635712, 7427658739644928}, 20] (* Harvey P. Dale, Mar 04 2016 *)

PROG

(Magma) [(6*n+4)^9: n in [0..20]]; // Vincenzo Librandi, May 07 2011

CROSSREFS

Cf. A016797, A016957, A016958, A016959, A016960, A016961, A016962, A016963, A016964.

Subsequence of A001017.

Sequence in context: A030637 A236226 A183818 * A017037 A017121 A017217

Adjacent sequences:  A016962 A016963 A016964 * A016966 A016967 A016968

KEYWORD

nonn,easy

AUTHOR

N. J. A. Sloane

STATUS

approved

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Last modified July 2 21:48 EDT 2022. Contains 355029 sequences. (Running on oeis4.)