id:A087122 - OEIS Search Results

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a(n) is the number of non-congruent solutions to x^2*y^2 = 0 mod n.

+0
1

1, 3, 5, 12, 9, 15, 13, 32, 45, 27, 21, 60, 25, 39, 45, 128, 33, 135, 37, 108 (list; graph; listen)

	OFFSET	`1,2`
	CROSSREFS	`Cf. A078430, A018804.` `Adjacent sequences: A087119 A087120 A087121 this_sequence A087123 A087124 A087125` `Sequence in context: A079037 A101315 A066541 this_sequence A037221 A080560 A057587`
	KEYWORD	`mult,nonn`
	AUTHOR	`Yuval Dekel (dekelyuval(AT)hotmail.com), Oct 18 2003`

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Last modified October 13 02:37 EDT 2008. Contains 145008 sequences.