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A119094 Numbers n such that the n-th triangular number contains only digits {0,7,8}. 2
12, 39, 132, 1332, 13332, 41732, 118387, 126560, 133332, 1241612, 1333332, 11905535, 13333332, 124970227, 133333332, 1333333332, 11906972812, 13333333332, 37418660507, 37626774267, 42163256012, 133333333332 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..22.

G. Resta, Tridigital Triangular Numbers

CROSSREFS

Cf. A000217, A119093. See A119034 for a table of cross-references.

Sequence in context: A186779 A154266 A236267 * A226348 A139691 A292544

Adjacent sequences:  A119091 A119092 A119093 * A119095 A119096 A119097

KEYWORD

nonn,base

AUTHOR

Giovanni Resta, May 10 2006

STATUS

approved

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Last modified March 3 04:02 EST 2021. Contains 341756 sequences. (Running on oeis4.)