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A151750
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Numbers n such that gcd( binomial(2n,n), 3*5*7*11 ) = 1.
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5
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OFFSET
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1,3
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COMMENTS
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It is conjectured that there are no other terms.
There are no further terms below 10^10000.
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LINKS
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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) 281-344.
C. Pomerance, Divisors of the middle binomial coefficient, Amer. Math. Monthly, 112 (2015), 636-644.
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CROSSREFS
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Sequence in context: A252215 A250760 A184452 * A252636 A068266 A140350
Adjacent sequences: A151747 A151748 A151749 * A151751 A151752 A151753
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KEYWORD
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nonn,bref
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AUTHOR
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N. J. A. Sloane, Jul 30 2009
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STATUS
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approved
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