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A119175 Numbers n such that the n-th triangular number contains only digits {2,6,8}. 2
3, 7, 11, 36, 72, 676, 1287, 2108, 11512, 21112, 23927, 35447, 37112, 41527, 67323, 35289847, 41633847, 11684368072, 24026103588, 364110500487, 7566093164465563 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Next entry must be greater than 1.4*10^16.

LINKS

Table of n, a(n) for n=1..21.

G. Resta, Tridigital Triangular Numbers

CROSSREFS

Cf. A000217, A119174. See A119034 for a table of cross-references.

Sequence in context: A091938 A186893 A051919 * A038913 A141178 A106966

Adjacent sequences:  A119172 A119173 A119174 * A119176 A119177 A119178

KEYWORD

nonn,base,more

AUTHOR

Giovanni Resta, May 10 2006

STATUS

approved

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Last modified January 21 02:59 EST 2019. Contains 319344 sequences. (Running on oeis4.)