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A119138 Triangular numbers composed of digits {1,5,9}. +0
3
1, 15, 55, 91, 595, 5151, 5995, 9591, 1511191, 51151555, 195911115, 511151999595, 519191199555, 555595555515, 595151955555, 591915955919511, 15995115959551911, 159955559191119511, 9199995595111955111955555 (list; graph; listen)
OFFSET

1,2

LINKS

G. Resta, Tridigital Triangular Numbers

CROSSREFS

Cf. A000217, A119139. See A119033 for a table of cross-references.

Adjacent sequences: A119135 A119136 A119137 this_sequence A119139 A119140 A119141

Sequence in context: A059145 A086643 A039369 this_sequence A043192 A043972 A062025

KEYWORD

nonn,base

AUTHOR

Giovanni Resta (g.resta(AT)iit.cnr.it), May 10 2006

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Last modified October 13 17:46 EDT 2008. Contains 145008 sequences.


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