A047667 Row 3 of array in A047666.

3, 10, 25, 52, 95, 158, 245, 360, 507, 690, 913, 1180, 1495, 1862, 2285, 2768, 3315, 3930, 4617, 5380, 6223, 7150, 8165, 9272, 10475, 11778, 13185, 14700, 16327, 18070, 19933, 21920, 24035, 26282, 28665, 31188, 33855, 36670, 39637

Offset

1,1

Links

Table of n, a(n) for n=1..39.

Index entries for linear recurrences with constant coefficients, signature (4, -6, 4, -1).

Formula

a(n) = (n/3) * (2n^2 + 7).

Crossrefs

Sequence in context: A212068 A162607 A267574 * A192963 A000247 A097763

Adjacent sequences: A047664 A047665 A047666 * A047668 A047669 A047670

Keyword

nonn

Author

N. J. A. Sloane

Status

approved