OFFSET
2,2
LINKS
Tewodros Amdeberhan, George E. Andrews and Roberto Tauraso, Extensions of MacMahon's sums of divisors, arXiv:2309.03191v1 [math.CO], Sep 06 2023.
FORMULA
a(n) = (7*sigma_3(n) - (6*n+1)*sigma(n))/24.
MATHEMATICA
A374929[n_] := (7*DivisorSigma[3, n] - (6*n + 1)*DivisorSigma[1, n])/24;
Array[A374929, 50, 2] (* Paolo Xausa, Jul 24 2024 *)
PROG
(PARI) a(n) = (7*sigma(n, 3)-(6*n+1)*sigma(n))/24;
CROSSREFS
KEYWORD
nonn
AUTHOR
Seiichi Manyama, Jul 24 2024
STATUS
approved