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A119163 Numbers n such that the n-th triangular number contains only digits {2,4,8}. 2
7, 312, 1287, 1297912, 7054712, 7521287, 2384302087 (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, A119162. See A119034 for a table of cross-references.

Sequence in context: A300870 A239163 A086215 * A171148 A219267 A244851

Adjacent sequences:  A119160 A119161 A119162 * A119164 A119165 A119166

KEYWORD

nonn,base,more

AUTHOR

Giovanni Resta, May 10 2006

STATUS

approved

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Last modified November 19 03:48 EST 2019. Contains 329310 sequences. (Running on oeis4.)