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A119173
Numbers k such that the k-th triangular number contains only digits {2,6,7}.
2
3, 11, 23, 36, 123, 3651, 394123, 2307651, 74534188, 394392348, 3639430251, 1159885996348
OFFSET
1,1
COMMENTS
Next term exceeds 4.4*10^18.
CROSSREFS
Cf. A000217, A119172. See A119034 for a table of cross-references.
Sequence in context: A094379 A072671 A320901 * A106201 A132209 A142463
KEYWORD
nonn,base,more
AUTHOR
Giovanni Resta, May 10 2006
EXTENSIONS
Lower bound for further terms updated by Max Alekseyev, May 07 2009
STATUS
approved