id:A068144 - OEIS Search Results

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Triangular numbers which are a concatenation of two or more positive triangular numbers.

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36, 66, 136, 153, 378, 666, 1128, 1378, 1711, 2145, 3003, 3321, 3655, 3741, 3916, 4656, 6105, 6216, 6328, 6786, 6903, 10153, 11325, 11628, 11781, 13366, 13861, 16110, 19110, 21115, 21321, 21528, 32131, 33153, 35511, 35778, 36315, 39903 (list; graph; listen)

	OFFSET	`1,1`
	LINKS	`Jon Schoenfield, Table of n, a(n) for n = 1..1000`
	EXAMPLE	`1378 is the concatenation of 1, 3 and 78. 16110 is the concatenation of 1, 6, 1 and 10.`
	CROSSREFS	`Cf. A000217.` `Sequence in context: A060671 A074315 A126789 this_sequence A036785 A114127 A044102` `Adjacent sequences: A068141 A068142 A068143 this_sequence A068145 A068146 A068147`
	KEYWORD	`nonn`
	AUTHOR	`Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Feb 23 2002`
	EXTENSIONS	`Corrected and extended by Jon E. Schoenfield (jonscho(AT)hiwaay.net), Sep 06 2006`

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Last modified December 19 12:50 EST 2009. Contains 171053 sequences.

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