OFFSET
0,3
MATHEMATICA
a[n_] := FiniteAbelianGroupCount[4*n + 1]; Array[a, 100, 0] (* Amiram Eldar, Sep 23 2023 *)
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
N. J. A. Sloane, Jan 28 2005
EXTENSIONS
More terms from Joshua Zucker, May 10 2006
STATUS
approved