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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
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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 April 24 22:17 EDT 2024. Contains 371964 sequences. (Running on oeis4.)