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A119157 Numbers k such that the k-th triangular number contains only digits {2,3,8}. 2
2, 7, 87, 1287, 881287, 21158087, 25800318712, 7535029241912 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Next term exceeds 4.4*10^18.

LINKS

Table of n, a(n) for n=1..8.

G. Resta, Tridigital Triangular Numbers

CROSSREFS

Cf. A000217, A119156. See A119034 for a table of cross-references.

Sequence in context: A041291 A209331 A054919 * A079701 A327039 A096208

Adjacent sequences:  A119154 A119155 A119156 * A119158 A119159 A119160

KEYWORD

nonn,base,more

AUTHOR

Giovanni Resta, May 10 2006

EXTENSIONS

Lower bound for the next term updated by Max Alekseyev, May 21 2009

STATUS

approved

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Last modified December 7 20:19 EST 2021. Contains 349588 sequences. (Running on oeis4.)