id:A119345 - OEIS Search Results

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A119345

Numbers having exactly one representation as sum of two triangular numbers.

+0
5

0, 1, 2, 3, 4, 7, 9, 10, 11, 12, 13, 15, 18, 20, 22, 24, 25, 27, 28, 29, 30, 34, 37, 38, 39, 43, 45, 48, 49, 57, 58, 60, 61, 64, 65, 67, 69, 70, 73, 78, 79, 83, 84, 87, 88, 90, 92, 93, 97, 99, 100, 101, 102, 105, 108, 110, 112, 114, 115, 119, 127, 130, 132, 135, 137, 139, 142 (list; graph; listen)

	OFFSET	`1,3`
	COMMENT	`A052343(a(n)) = 1; gives A020756 together with A118139.`
	CROSSREFS	`Cf. A020757, A000217.` `Sequence in context: A006549 A159554 A101128 this_sequence A086391 A120127 A047548` `Adjacent sequences: A119342 A119343 A119344 this_sequence A119346 A119347 A119348`
	KEYWORD	`nonn`
	AUTHOR	`Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), May 15 2006`

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

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