A373040 a(n) = (A084218(n) - 1)/12.

0, 1, 6, 17, 50, 79, 196, 273, 492, 651, 1210, 1247, 2366, 2549, 3656, 4369, 6936, 6397, 10830, 10267, 14314, 15731, 23276, 19935, 31300, 30759, 39858, 40197, 58870, 47529, 76880, 69905, 88336, 90169, 117846, 100877, 156066, 140791, 172724, 164123, 235340, 186083

Offset

1,3

Links

Table of n, a(n) for n=1..42.

Prog

(PARI) a(n) = (sigma(n^2, 4)/sigma(n^2, 2) - 1)/12

Crossrefs

Cf. A000290, A001157, A001159, A372966, A373039.

Sequence in context: A054492 A128525 A083334 * A199113 A297297 A241352

Adjacent sequences: A373037 A373038 A373039 * A373041 A373042 A373043

Keyword

nonn

Author

Hugo Pfoertner, May 20 2024

Status

approved