id:A119211 - OEIS Search Results

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Numbers n such that the n-th triangular number contains only digits {4,6,7}.

+0
3

3, 11, 36, 976, 1236, 3048, 964131, 36536961224668, 123828734689848, 299247973315331 (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, A119210. See A119034 for a table of cross-references.` `Sequence in context: A119090 A048361 A119161 this_sequence A119235 A119233 A069358` `Adjacent sequences: A119208 A119209 A119210 this_sequence A119212 A119213 A119214`
	KEYWORD	`nonn,base,more`
	AUTHOR	`Giovanni Resta (g.resta(AT)iit.cnr.it), May 10 2006`

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.