OFFSET
0,2
COMMENTS
The numbers n*2^n+1 are called Cullen numbers.
MATHEMATICA
DivisorSigma[1, Table[n*2^n+1, {n, 0, 30}]] (* Paul F. Marrero Romero, Dec 17 2023 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Sean A. Irvine, Oct 31 2023
STATUS
approved