A016770 a(n) = (3*n)^6.

0, 729, 46656, 531441, 2985984, 11390625, 34012224, 85766121, 191102976, 387420489, 729000000, 1291467969, 2176782336, 3518743761, 5489031744, 8303765625, 12230590464, 17596287801, 24794911296

Offset

0,2

Links

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

Index entries for linear recurrences with constant coefficients, signature (7,-21,35,-35,21,-7,1).

Formula

G.f.: -729*x*(1+x)*(x^4 + 56*x^3 + 246*x^2 + 56*x + 1)/(x-1)^7. - R. J. Mathar, Jul 07 2017

Mathematica

(3Range[0, 20])^6 (* Harvey P. Dale, May 08 2011 *)

Prog

(Magma) [(3*n)^6: n in [0..25]]; // Vincenzo Librandi, May 09 2011

Crossrefs

Cf. A001014 (n^6).

Sequence in context: A223281 A268976 A224357 * A224016 A059978 A223208

Adjacent sequences: A016767 A016768 A016769 * A016771 A016772 A016773

Keyword

nonn,easy

Author

N. J. A. Sloane

Status

approved