A016890 a(n) = (5n+3)^6.

729, 262144, 4826809, 34012224, 148035889, 481890304, 1291467969, 3010936384, 6321363049, 12230590464, 22164361129, 38068692544, 62523502209, 98867482624, 151334226289, 225199600704, 326940373369

Offset

0,1

Links

Table of n, a(n) for n=0..16.

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

Formula

G.f.: (-729-257041 x-3007110 x^2-5704070 x^3-2163785 x^4-117201 x^5-64 x^6)/(-1+x)^7 - Harvey P. Dale, Nov 15 2025

Mathematica

(5*Range[0, 20]+3)^6 (* or *) LinearRecurrence[{7, -21, 35, -35, 21, -7, 1}, {729, 262144, 4826809, 34012224, 148035889, 481890304, 1291467969}, 20] (* Harvey P. Dale, Nov 15 2025 *)

Crossrefs

Sequence in context: A231861 A232954 A222168 * A223555 A222443 A223330

Adjacent sequences: A016887 A016888 A016889 * A016891 A016892 A016893

Keyword

nonn,easy

Author

N. J. A. Sloane

Status

approved