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A119233 Numbers k such that the k-th triangular number contains only digits {6,7,9}. 2
3, 11, 36, 36817576, 365512507857054543 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Next term exceeds 4.4*10^17.
LINKS
Table of n, a(n) for n=1..5.
G. Resta, Tridigital Triangular Numbers
CROSSREFS
Cf. A000217, A119232. See A119034 for a table of cross-references.
Sequence in context: A119161 A119211 A119235 * A178563 A069358 A108544
Adjacent sequences: A119230 A119231 A119232 * A119234 A119235 A119236
KEYWORD
nonn,base,more
AUTHOR
Giovanni Resta, May 10 2006
EXTENSIONS
365512507857054543 from Max Alekseyev, Mar 10 2009
STATUS
approved

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Last modified May 18 04:34 EDT 2024. Contains 372618 sequences. (Running on oeis4.)