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A119078
Numbers k such that the k-th triangular number contains only digits {0,4,9}.
2
44, 2831780, 1407437419, 140715344155
OFFSET
1,1
COMMENTS
Next term exceeds 1.4*10^16.
CROSSREFS
Cf. A000217, A119077. See A119034 for a table of cross-references.
Sequence in context: A277840 A172828 A115734 * A172878 A001782 A172910
KEYWORD
nonn,base,more
AUTHOR
Giovanni Resta, May 10 2006
STATUS
approved