id:A119066 - OEIS Search Results

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Numbers n such that the n-th triangular number contains only digits {0,3,7}.

+0
3

2, 24, 37, 77, 775, 3943940, 7844837, 124153399, 393193023940, 78406253666877, 256907649052235, 1240997802874797 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`Next entry must be greater than 1.4*10^16.`
	LINKS	`G. Resta, Tridigital Triangular Numbers`
	CROSSREFS	`Cf. A000217, A119065. See A119034 for a table of cross-references.` `Sequence in context: A022374 A139334 A112660 this_sequence A019996 A119070 A073215` `Adjacent sequences: A119063 A119064 A119065 this_sequence A119067 A119068 A119069`
	KEYWORD	`nonn,base,more`
	AUTHOR	`Giovanni Resta (g.resta(AT)iit.cnr.it), May 10 2006`

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Last modified July 23 17:35 EDT 2008. Contains 142285 sequences.