id:A068125 - OEIS Search Results

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Possible initial digits of a triangular number.

+0
2

0, 1, 3, 5, 6, 8, 10, 11, 15, 16, 20, 21, 25, 26, 28, 30, 31, 35, 36, 40, 41, 45, 46, 50, 51, 53, 55, 56, 60, 61, 65, 66, 70, 71, 75, 76, 78, 80, 81, 85, 86, 90, 91, 95, 96, 100, 101, 105, 106, 110, 111, 115, 116, 120, 121, 125, 126, 128, 130, 131, 135, 136, 140, 141 (list; graph; listen)

	OFFSET	`0,3`
	EXAMPLE	`11 is a term as 1711 is a triangular number. 13 is not as no triangular number is of the form 100k + 13.`
	CROSSREFS	`Sequence in context: A138235 A059541 A003152 this_sequence A139437 A083042 A082977` `Adjacent sequences: A068122 A068123 A068124 this_sequence A068126 A068127 A068128`
	KEYWORD	`base,easy,nonn`
	AUTHOR	`Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Feb 21 2002`
	EXTENSIONS	`More terms from Sascha Kurz (sascha.kurz(AT)uni-bayreuth.de), Apr 03 2002`

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Last modified July 25 07:41 EDT 2008. Contains 142293 sequences.

AT&T Labs Research