id:A119166 - OEIS Search Results

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Triangular numbers composed of digits {2,5,7}.

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55, 2775, 255255, 577275, 572755525755, 2577527227575, 727275225222727525, 2257227755272522252275, 52722757572552577725225 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`Next entry must be greater than 10^32.`
	LINKS	`G. Resta, Tridigital Triangular Numbers`
	CROSSREFS	`Cf. A000217, A030485, A119167. See A119033 for a table of cross-references.` `Sequence in context: A012048 A020536 A131557 this_sequence A027548 A076657 A095659` `Adjacent sequences: A119163 A119164 A119165 this_sequence A119167 A119168 A119169`
	KEYWORD	`nonn,base,more`
	AUTHOR	`Giovanni Resta (g.resta(AT)iit.cnr.it), May 10 2006`

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Last modified July 25 07:41 EDT 2008. Contains 142293 sequences.