id:A072400 - OEIS Search Results

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(Factors of 4 removed from n) modulo 8.

+0
3

1, 2, 3, 1, 5, 6, 7, 2, 1, 2, 3, 3, 5, 6, 7, 1, 1, 2, 3, 5, 5, 6, 7, 6, 1, 2, 3, 7, 5, 6, 7, 2, 1, 2, 3, 1, 5, 6, 7, 2, 1, 2, 3, 3, 5, 6, 7, 3, 1, 2, 3, 5, 5, 6, 7, 6, 1, 2, 3, 7, 5, 6, 7, 1, 1, 2, 3, 1, 5, 6, 7, 2, 1, 2, 3, 3, 5, 6, 7, 5, 1, 2, 3, 5, 5, 6, 7, 6, 1, 2, 3, 7, 5, 6, 7, 6 (list; graph; listen)

	OFFSET	`0,2`
	COMMENT	`a(n)<>7 iff n equals the sum of 3 integer squares.` `a(A004215(k)) = 7 for k>0;`
	LINKS	`Eric Weisstein's World of Mathematics, Square Numbers.`
	CROSSREFS	`a(n) = A065883(n) mod 8.` `A072401(n) = 1 - A057427(7 - a(n)).` `Cf. A000378.` `Sequence in context: A130508 A055231 A160400 this_sequence A007913 A083346 A065883` `Adjacent sequences: A072397 A072398 A072399 this_sequence A072401 A072402 A072403`
	KEYWORD	`nonn`
	AUTHOR	`Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Jun 16 2002`

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

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