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A119211
Numbers k such that the k-th triangular number contains only digits {4,6,7}.
2
3, 11, 36, 976, 1236, 3048, 964131, 36536961224668, 123828734689848, 299247973315331
(list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Next term exceeds 1.4*10^16.
LINKS
Table of n, a(n) for n=1..10.
G. Resta, Tridigital Triangular Numbers
CROSSREFS
Cf. A000217, A119210. See A119034 for a table of cross-references.
Sequence in context: A119090 A048361 A119161 * A119235 A119233 A178563
Adjacent sequences: A119208 A119209 A119210 * A119212 A119213 A119214
KEYWORD
nonn,base,more
AUTHOR
Giovanni Resta, May 10 2006
STATUS
approved

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Last modified September 28 15:16 EDT 2024. Contains 376297 sequences.
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