id:A053869 - OEIS Search Results

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Sum of divisors of n less than n is even.

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1, 6, 9, 10, 12, 14, 20, 22, 24, 25, 26, 28, 30, 34, 38, 40, 42, 44, 46, 48, 49, 52, 54, 56, 58, 60, 62, 66, 68, 70, 74, 76, 78, 80, 81, 82, 84, 86, 88, 90, 92, 94, 96, 102, 104, 106, 108, 110, 112, 114, 116, 118, 120, 121, 122, 124, 126, 130, 132, 134, 136, 138, 140 (list; graph; listen)

	OFFSET	`0,2`
	COMMENT	`Numbers which if odd are squares, and which if even are neither squares nor twice squares.`
	CROSSREFS	`Cf. A001065, A028982.` `Sequence in context: A111774 A036347 A129492 this_sequence A085275 A090466 A090428` `Adjacent sequences: A053866 A053867 A053868 this_sequence A053870 A053871 A053872`
	KEYWORD	`nonn`
	AUTHOR	`Henry Bottomley (se16(AT)btinternet.com), Mar 29 2000`

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Last modified September 5 17:15 EDT 2008. Contains 143476 sequences.

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