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A119098 Numbers k such that the k-th triangular number contains only digits {1,2,3}. 2
1, 2, 6, 21, 66, 81, 206, 253, 666, 681, 4718, 6666, 6681, 66666, 66681, 156341, 666666, 666681, 1497406, 1569281, 6666666, 6666681, 66666666, 66666681, 666666666, 666666681, 6528600666, 6666666666, 6666666681, 66666666666 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
LINKS
CROSSREFS
Cf. A000217, A119097. See A119034 for a table of cross-references.
Sequence in context: A245749 A342440 A001434 * A294706 A294707 A116842
KEYWORD
nonn,base
AUTHOR
Giovanni Resta, May 10 2006
STATUS
approved

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Last modified September 10 11:53 EDT 2024. Contains 375789 sequences. (Running on oeis4.)