A165913 -id:A165913 - cp's OEIS frontend

A165914 a(n) = sum of the squarefree quadratic residues of n.

0, 1, 1, 1, 1, 4, 3, 1, 8, 12, 9, 1, 14, 21, 17, 1, 31, 31, 47, 6, 23, 49, 25, 1, 72, 103, 72, 22, 77, 72, 58, 18, 72, 177, 121, 14, 176, 180, 79, 1, 202, 172, 276, 76, 95, 249, 184, 34, 298, 318, 251, 60, 362, 263, 137, 1, 242, 479, 448, 22, 456, 432, 214, 149

Offset: 1

Christopher Hunt Gribble, Sep 30 2009

nonn

C. H. Gribble, Table of n, a(n) for n=1,...,1000.

Cf: A165913

a(1) added and Cf corrected by Christopher Hunt Gribble, Oct 05 2009

A165915 a(n) = number of squarefree nonzero quadratic residues of n.

Original entry on oeis.org

0, 1, 1, 1, 1, 2, 2, 1, 2, 3, 3, 1, 3, 4, 3, 1, 4, 4, 6, 2, 3, 6, 5, 1, 6, 8, 6, 2, 7, 6, 7, 2, 5, 10, 7, 2, 10, 11, 6, 1, 10, 8, 14, 4, 5, 12, 11, 2, 12, 13, 10, 4, 15, 11, 8, 1, 9, 17, 17, 2, 16, 16, 7, 5, 11, 11, 21, 6, 9, 12, 15, 1, 19, 23, 12, 6, 13, 14, 21, 3, 18, 24, 24, 4, 14

Offset: 1