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A119167
Numbers k such that the k-th triangular number contains only digits {2,5,7}.
2
10, 74, 714, 1074, 1070285, 2270474, 1206047449, 67189697949, 324723752049, 23346424812260967349
OFFSET
1,1
CROSSREFS
Cf. A000217, A119166. See A119034 for a table of cross-references.
Sequence in context: A279284 A264082 A103434 * A233100 A266674 A233455
KEYWORD
nonn,base,more
AUTHOR
Giovanni Resta, May 10 2006
EXTENSIONS
a(10) from Tyler Busby, Mar 31 2023
STATUS
approved