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A119147 Numbers k such that the k-th triangular number contains only digits {1,7,8}. 2
1, 12, 18, 58, 132, 153, 1332, 1541, 6018, 11981, 13332, 40278, 124753, 133332, 603121, 1332507, 1333332, 13332507, 13333332, 19072906, 133332507, 133333332, 485569333, 486040907, 612880278, 1247972658, 1333332507 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
LINKS
CROSSREFS
Cf. A000217, A119146. See A119034 for a table of cross-references.
Sequence in context: A259263 A341039 A279369 * A370395 A226176 A177426
KEYWORD
nonn,base
AUTHOR
Giovanni Resta, May 10 2006
STATUS
approved

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Last modified June 13 17:32 EDT 2024. Contains 373391 sequences. (Running on oeis4.)