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A165915
a(n) = number of squarefree nonzero quadratic residues of n.
1
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
1,6
LINKS
CROSSREFS
Cf. A165913.
Sequence in context: A368175 A106580 A355080 * A269783 A043276 A319416
KEYWORD
nonn
AUTHOR
EXTENSIONS
a(1) added and definition corrected by Christopher Hunt Gribble, Oct 05 2009
STATUS
approved