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A119231 Numbers n such that the n-th triangular number contains only digits {6,7,8}. 2
3, 11, 12, 36, 116, 132, 1163, 1332, 13332, 133332, 1333332, 3941747, 11737707, 13333332, 133333332, 1333333332, 13333333332, 133333333332, 416381478667, 1254414499811, 1333333333332, 4187521168132, 11635005525283 (list; graph; refs; listen; history; internal format)
OFFSET

1,1

LINKS

G. Resta, Tridigital Triangular Numbers

CROSSREFS

Cf. A000217, A119230. See A119034 for a table of cross-references.

Sequence in context: A045110 A055046 A141386 * A177335 A031449 A090260

Adjacent sequences:  A119228 A119229 A119230 * A119232 A119233 A119234

KEYWORD

nonn,base

AUTHOR

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

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Last modified February 16 13:30 EST 2012. Contains 205909 sequences.