id:A119173 - OEIS Search Results

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Numbers n such that the n-th triangular number contains only digits {2,6,7}.

+0
3

3, 11, 23, 36, 123, 3651, 394123, 2307651, 74534188, 394392348, 3639430251, 1159885996348 (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, A119172. See A119034 for a table of cross-references.` `Sequence in context: A018630 A094379 A072671 this_sequence A106201 A132209 A086497` `Adjacent sequences: A119170 A119171 A119172 this_sequence A119174 A119175 A119176`
	KEYWORD	`nonn,base,more`
	AUTHOR	`Giovanni Resta (g.resta(AT)iit.cnr.it), May 10 2006`

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Last modified September 6 09:40 EDT 2008. Contains 143480 sequences.