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A119120 Numbers k such that the k-th triangular number contains only digits {1,3,8}. 2
1, 2, 421, 1541, 8753, 150421, 12914246, 1327696379533, 4034385661121, 605166395826533, 16360402306368458, 249752330575267378 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
Next term exceeds 4.4*10^18.
LINKS
CROSSREFS
Cf. A000217, A119119. See A119034 for a table of cross-references.
Sequence in context: A365520 A080392 A154541 * A332142 A109931 A352498
KEYWORD
nonn,base,more
AUTHOR
Giovanni Resta, May 10 2006
EXTENSIONS
Two more terms from Max Alekseyev, May 12 2009
STATUS
approved

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Last modified March 28 20:05 EDT 2024. Contains 371254 sequences. (Running on oeis4.)