A047661 Row 5 of square array defined in A047662.

5, 30, 115, 340, 841, 1826, 3591, 6536, 11181, 18182, 28347, 42652, 62257, 88522, 123023, 167568, 224213, 295278, 383363, 491364, 622489, 780274, 968599, 1191704, 1454205, 1761110, 2117835, 2530220, 3004545, 3547546

Offset

1,1

Links

Table of n, a(n) for n=1..30.

Formula

a(n) = (n/15) * (2*n^4 + 5*n^3 + 20*n^2 + 25*n + 23) [Corrected by Sean A. Irvine, May 13 2021].

Mathematica

Table[(n/15)(2n^4+5n^3+20n^2+25n+23), {n, 30}] (* Harvey P. Dale, Nov 25 2022 *)

Crossrefs

Sequence in context: A062990 A018213 A359975 * A000649 A027173 A286973

Adjacent sequences: A047658 A047659 A047660 * A047662 A047663 A047664

Keyword

nonn

Author

N. J. A. Sloane

Status

approved