A024500 a(n) = [ C(2n,n)/n^2 ].

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

Links

Table of n, a(n) for n=1..28.

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

Adjacent sequences: A024497 A024498 A024499 * A024501 A024502 A024503

Keyword

nonn

Author

Clark Kimberling

Status

approved