A112352 - OEIS

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A112352

Triangular numbers that are the sum of two distinct positive triangular numbers.

21, 36, 55, 66, 91, 120, 136, 171, 231, 276, 351, 378, 406, 496, 561, 666, 703, 741, 820, 861, 946, 990, 1035, 1081, 1176, 1225, 1326, 1378, 1431, 1485, 1540, 1596, 1653, 1711, 1770, 1891, 1953, 2016, 2080, 2211, 2278, 2346, 2556, 2701, 2775, 2850, 2926 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,1`
	COMMENTS	`Subsequence of A089982: it doesn't require the two positive triangular numbers to be distinct.`
	EXAMPLE	`36 is a term because 36 = 15 + 21 and these three numbers are distinct triangular numbers (A000217(8) = A000217(5) + A000217(6)).`
	CROSSREFS	`Cf. A000217 (triangular numbers), A112353 (triangular numbers that are the sum of three distinct positive triangular numbers), A089982.` `Sequence in context: A138227 A155710 A001491 * A168513 A067598 A043683` `Adjacent sequences: A112349 A112350 A112351 * A112353 A112354 A112355`
	KEYWORD	`nonn`
	AUTHOR	`Rick L. Shepherd (rshepherd2(AT)hotmail.com), Sep 05 2005`

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Last modified February 14 09:50 EST 2012. Contains 205614 sequences.