id:A119101 - OEIS Search Results

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A119101

Triangular numbers composed of digits {1,2,5}.

+0
3

1, 15, 21, 55, 1225, 2211, 5151, 15225, 21115, 22155, 151525, 222111, 255255, 11551221, 12552555, 21115251, 22221111, 51151555, 111221155, 251115255, 2222211111, 2552515525, 111251152551, 122515222515, 222222111111 (list; graph; listen)

	OFFSET	`1,2`
	LINKS	`G. Resta, Tridigital Triangular Numbers`
	CROSSREFS	`Cf. A000217, A031153, A119102. See A119033 for a table of cross-references.` `Sequence in context: A015831 A063176 A083372 this_sequence A084931 A066758 A018888` `Adjacent sequences: A119098 A119099 A119100 this_sequence A119102 A119103 A119104`
	KEYWORD	`nonn,base`
	AUTHOR	`Giovanni Resta (g.resta(AT)iit.cnr.it), May 10 2006`

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Last modified August 29 17:54 EDT 2008. Contains 143238 sequences.

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