OFFSET
1,3
LINKS
William Craig, Jan-Willem van Ittersum, and Ken Ono, Integer partitions detect the primes, arXiv:2405.06451v2 [math.CO], Jul 10 2024.
FORMULA
MATHEMATICA
a[n_]:= (n - 1) * (n - 2) * DivisorSigma[1, n]; Array[a, 42] (* Stefano Spezia, Jul 23 2024 *)
PROG
(PARI) a(n) = (n-1)*(n-2)*sigma(n);
CROSSREFS
KEYWORD
nonn
AUTHOR
Seiichi Manyama, Jul 23 2024
STATUS
approved