id:A078254 - OEIS Search Results

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Triangular numbers in which alternate digits are equal.

+0
1

0, 1, 3, 6, 10, 15, 21, 28, 36, 45, 55, 66, 78, 91, 171, 595, 666, 5050, 5151 (list; graph; listen)

	OFFSET	`0,3`
	COMMENT	`Conjecture: sequence is finite.`
	CROSSREFS	`Adjacent sequences: A078251 A078252 A078253 this_sequence A078255 A078256 A078257` `Sequence in context: A069695 A069697 A069699 this_sequence A069700 A069698 A069696`
	KEYWORD	`base,more,nonn`
	AUTHOR	`Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Nov 24 2002`

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Last modified October 5 16:50 EDT 2008. Contains 144613 sequences.