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A119209
Numbers k such that the k-th triangular number contains only digits {4,5,9}.
2
9, 10, 34, 109, 314, 334, 1090, 3334, 33334, 141109, 333334, 436909, 3333334, 4369314, 31609965, 33166234, 33333334, 333333334, 3333333334, 3464100314, 33316662334, 33333333334, 104828011090, 301512701090, 333333333334
OFFSET
1,1
CROSSREFS
Cf. A000217, A119208. See A119034 for a table of cross-references.
Sequence in context: A322653 A322465 A353600 * A329636 A289520 A038206
KEYWORD
nonn,base
AUTHOR
Giovanni Resta, May 10 2006
STATUS
approved