id:A084349 - OEIS Search Results

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Square-free numbers which can not be written as sum of two squares.

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1, 3, 6, 7, 11, 14, 15, 19, 21, 22, 23, 30, 31, 33, 35, 38, 39, 42, 43, 46, 47, 51, 55, 57, 59, 62, 66, 67, 69, 70, 71, 77, 78, 79, 83, 86, 87, 91, 93, 94, 95, 102, 103, 105, 107, 110, 111, 114, 115, 118, 119, 123, 127, 129, 131, 133, 134, 138, 139, 141, 142, 143 (list; graph; listen)

	OFFSET	`1,2`
	EXAMPLE	`A005117(10)=14: 14-1^2=13, 14-2^2=10, and 14-3^3=5 are non-squares, therefore 14 is a term;` `A005117(9)=13 is not a term: A020893(4) = 13 = 2^2 + 3^2.`
	CROSSREFS	`Cf. A020893, A005117, A000290.` `Adjacent sequences: A084346 A084347 A084348 this_sequence A084350 A084351 A084352` `Sequence in context: A022550 A076644 A087642 this_sequence A126003 A047556 A015819`
	KEYWORD	`nonn`
	AUTHOR	`Reinhard Zumkeller (reinhard.zumkeller(AT)lhsystems.com), Jun 21 2003`

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Last modified May 16 23:01 EDT 2008. Contains 139884 sequences.

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