A119173 - OEIS

This site is supported by donations to The OEIS Foundation.

A119173

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

3, 11, 23, 36, 123, 3651, 394123, 2307651, 74534188, 394392348, 3639430251, 1159885996348 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,1`
	COMMENTS	`Next entry must be greater than 4.4*10^18.`
	LINKS	`G. Resta, Tridigital Triangular Numbers`
	CROSSREFS	`Cf. A000217, A119172. See A119034 for a table of cross-references.` `Sequence in context: A163780 A094379 A072671 * A106201 A132209 A142463` `Adjacent sequences: A119170 A119171 A119172 * A119174 A119175 A119176`
	KEYWORD	`nonn,base,more`
	AUTHOR	`Giovanni Resta (g.resta(AT)iit.cnr.it), May 10 2006`
	EXTENSIONS	`Lower bound for further terms updated by Max Alekseyev (maxale(AT)gmail.com), May 07 2009`

Content is available under The OEIS End-User License Agreement .

Last modified February 14 23:53 EST 2012. Contains 205689 sequences.