id:A053443 - OEIS Search Results

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x^2 + y^2 does not take on all possible values mod n.

+0
2

4, 8, 9, 12, 16, 18, 20, 24, 27, 28, 32, 36, 40, 44, 45, 48, 49, 52, 54, 56, 60, 63, 64, 68, 72, 76, 80, 81, 84, 88, 90, 92, 96, 98, 99, 100, 104, 108, 112, 116, 117, 120, 121, 124, 126, 128, 132, 135, 136, 140, 144, 147, 148, 152, 153, 156, 160, 162, 164, 168, 171 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`Sequence gives values of n such there is a solution 1<x<n to x^2+n^2=n mod(n) - Benoit Cloitre (benoit7848c(AT)orange.fr), Jan 04 2002`
	FORMULA	`n divisible by p^2 where p = 2 or prime p == 3 (mod 4).`
	CROSSREFS	`A053444.` `Sequence in context: A013929 A162966 A034043 this_sequence A048098 A122145 A057109` `Adjacent sequences: A053440 A053441 A053442 this_sequence A053444 A053445 A053446`
	KEYWORD	`nonn`
	AUTHOR	`David W. Wilson (davidwwilson(AT)comcast.net)`

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Last modified December 18 21:37 EST 2009. Contains 171024 sequences.

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