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A119066
Numbers k such that the k-th triangular number contains only digits {0,3,7}.
2
2, 24, 37, 77, 775, 3943940, 7844837, 124153399, 393193023940, 78406253666877, 256907649052235, 1240997802874797
OFFSET
1,1
COMMENTS
Next term exceeds 1.4*10^16.
CROSSREFS
Cf. A000217, A119065. See A119034 for a table of cross-references.
Sequence in context: A330526 A280648 A339403 * A019996 A368042 A343817
KEYWORD
nonn,base,more
AUTHOR
Giovanni Resta, May 10 2006
STATUS
approved