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 A010058 1 if n is a Catalan number else 0. 3
 0, 1, 1, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,1 COMMENTS a(A000108(n)) = 1, a(A092459(n)) = 0. - Reinhard Zumkeller, Mar 29 2011 LINKS Robert Israel, Table of n, a(n) for n = 0..10000 FORMULA a(n) = abs(sgn(n - sup((2*k)!/(k!*(k + 1)!))) - 1), for n - (2*k)!/(k!*(k + 1)!) >= 0. - Ilya Gutkovskiy, Sep 27 2015 MAPLE V:= Array(0..1000): for n from 1 do c:= binomial(2*n, n)/(n+1);   if c > 1000 then break fi; V[c]:= 1; od: convert(V, list); # Robert Israel, Oct 13 2015 MATHEMATICA t = CatalanNumber@ Range@ 12; Table[Boole@ MemberQ[t, n], {n, 0, 96}] (* Michael De Vlieger, Sep 29 2015 *) CROSSREFS Cf. A000108, A092459. Sequence in context: A057212 A023959 A076182 * A140591 A203568 A079336 Adjacent sequences:  A010055 A010056 A010057 * A010059 A010060 A010061 KEYWORD nonn AUTHOR STATUS approved

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Last modified December 11 13:25 EST 2018. Contains 318049 sequences. (Running on oeis4.)