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A119078 Numbers n such that the n-th triangular number contains only digits {0,4,9}. 2
44, 2831780, 1407437419, 140715344155 (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..4.

G. Resta, Tridigital Triangular Numbers

CROSSREFS

Cf. A000217, A119077. See A119034 for a table of cross-references.

Sequence in context: A277840 A172828 A115734 * A172878 A001782 A172910

Adjacent sequences:  A119075 A119076 A119077 * A119079 A119080 A119081

KEYWORD

nonn,base,more

AUTHOR

Giovanni Resta, May 10 2006

STATUS

approved

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Last modified June 13 11:07 EDT 2021. Contains 344989 sequences. (Running on oeis4.)