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A119219
Numbers k such that the k-th triangular number contains only digits {5,6,7}.
3
3, 10, 11, 36, 105, 114, 3363, 3369, 3648, 10636, 1073010, 1164274, 33336636, 33336696, 107290789, 1063736505, 3887841963, 3333333366663363
OFFSET
1,1
COMMENTS
Next term exceeds 1.4*10^16.
CROSSREFS
Cf. A000217, A119218. See A119034 for a table of cross-references.
Sequence in context: A119165 A119080 A119221 * A125569 A201156 A309525
KEYWORD
nonn,base,more
AUTHOR
Giovanni Resta, May 10 2006
STATUS
approved