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A119181 Numbers n such that the n-th triangular number contains only digits {2,8,9}. 2
7, 1287, 4312, 14087, 75934087, 421883687, 773669476312 (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..7.

G. Resta, Tridigital Triangular Numbers

CROSSREFS

Cf. A000217, A119180. See A119034 for a table of cross-references.

Sequence in context: A159994 A278178 A190266 * A152518 A210396 A289482

Adjacent sequences:  A119178 A119179 A119180 * A119182 A119183 A119184

KEYWORD

nonn,base,more

AUTHOR

Giovanni Resta, May 10 2006

STATUS

approved

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Last modified October 16 05:41 EDT 2019. Contains 328044 sequences. (Running on oeis4.)