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A119189 Numbers k such that the k-th triangular number contains only digits {3,5,7}. 2
2, 10, 3386897, 10367022, 25898098514 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Next term exceeds 1.4*10^16.

LINKS

Table of n, a(n) for n=1..5.

G. Resta, Tridigital Triangular Numbers

CROSSREFS

Cf. A000217, A119188. See A119034 for a table of cross-references.

Sequence in context: A027735 A085698 A057095 * A309862 A260756 A252707

Adjacent sequences: A119186 A119187 A119188 * A119190 A119191 A119192

KEYWORD

nonn,base,more

AUTHOR

Giovanni Resta, May 10 2006

STATUS

approved

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Last modified February 7 02:40 EST 2023. Contains 360111 sequences. (Running on oeis4.)