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A151750
Numbers n such that gcd( binomial(2n,n), 3*5*7*11 ) = 1.
5
0, 1, 3160
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OFFSET
1,3
COMMENTS
It is conjectured that there are no other terms.
There are no further terms below 10^10000.
LINKS
Table of n, a(n) for n=1..3.
R. D. Mauldin, S. M. Ulam,
Mathematical problems and games
, Adv. Appl. Math. 8 (3) (1987) 281344.
C. Pomerance,
Divisors of the middle binomial coefficient
, Amer. Math. Monthly, 112 (2015), 636644.
CROSSREFS
Sequence in context:
A252215
A250760
A184452
*
A031610
A252636
A324678
Adjacent sequences:
A151747
A151748
A151749
*
A151751
A151752
A151753
KEYWORD
nonn
,
bref
AUTHOR
N. J. A. Sloane
, Jul 30 2009
STATUS
approved
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Last modified May 22 17:27 EDT 2024. Contains 372758 sequences. (Running on oeis4.)