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A024500
a(n) = [ C(2n,n)/n^2 ].
0
2, 1, 2, 4, 10, 25, 70, 201, 600, 1847, 5830, 18778, 61542, 204676, 689411, 2347970, 8074762, 28009676, 97909318, 344616322, 1220539397, 4347311908, 15564141262, 55985423060, 202256970300, 733607297260, 2670698800614, 9755982909133
OFFSET
1,1
MATHEMATICA
Table[Floor[Binomial[2n, n]/n^2], {n, 30}] (* Harvey P. Dale, Mar 20 2013 *)
CROSSREFS
Sequence in context: A343952 A063894 A268619 * A318870 A000087 A145667
KEYWORD
nonn
STATUS
approved