OFFSET
0,2
COMMENTS
The numbers n*2^n+1 are called Cullen numbers.
LINKS
Amiram Eldar, Table of n, a(n) for n = 0..865
MATHEMATICA
Table[DivisorSigma[0, n*2^n + 1], {n, 0, 100}] (* Amiram Eldar, Jan 06 2024 *)
PROG
(PARI) a(n) = numdiv(n*2^n + 1); \\ Amiram Eldar, Jan 06 2024
CROSSREFS
KEYWORD
nonn
AUTHOR
Sean A. Irvine, Oct 31 2023
STATUS
approved