id:A119044 - OEIS Search Results

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A119044

Numbers n such that the n-th triangular number contains only digits {0,1,7}.

+0
3

1, 4, 18, 58, 59, 141, 471418, 185310604, 451023506, 1184061400, 1844511706, 4474395400, 14266749459, 18444896915, 48521543066, 11838218371106, 39270880053981 (list; graph; listen)

	OFFSET	`1,2`
	COMMENT	`Next entry must be greater than 1.4*10^16.`
	LINKS	`G. Resta, Tridigital Triangular Numbers`
	CROSSREFS	`Cf. A000217, A119043. See A119034 for a table of cross-references.` `Sequence in context: A059133 A020644 A027286 this_sequence A058851 A073373 A057414` `Adjacent sequences: A119041 A119042 A119043 this_sequence A119045 A119046 A119047`
	KEYWORD	`nonn,base,more`
	AUTHOR	`Giovanni Resta (g.resta(AT)iit.cnr.it), May 10 2006`

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Last modified November 30 13:13 EST 2009. Contains 167758 sequences.

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