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A119142 Triangular numbers composed of digits {1,6,8}. +0
3
1, 6, 66, 666, 861, 116886, 1188111, 8166861, 681118686, 8186688861, 181886818816, 616886668881, 1611611188111, 6188181818668868161, 8188686181116816661, 61116116118118668181, 686168618118116111616 (list; graph; listen)
OFFSET

1,2
LINKS

G. Resta, Tridigital Triangular Numbers

CROSSREFS

Cf. A000217, A053909, A119143. See A119033 for a table of cross-references.

Sequence in context: A075138 A043041 A156237 this_sequence A119091 A119100 A119176

Adjacent sequences: A119139 A119140 A119141 this_sequence A119143 A119144 A119145

KEYWORD

nonn,base

AUTHOR

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

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Last modified December 7 08:40 EST 2009. Contains 170430 sequences.

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