A098510 Row sums of a matrix associated to the inverse of a Catalan scaled binomial matrix.

1, 2, 5, 20, 49, 210, 429, 2860, 7293, 34034, 113373, 537472, 1359507, 6611810, 24627135, 37917616, 177181213, 973514514, 1647439975, 12026570280, 17818756259, 98555142278, 502860886675, 4577646742140, 6402665244089

Offset

0,2

Comments

Row sums of A098509.

Links

Table of n, a(n) for n=0..24.

Formula

a(n)=sum{k=0..n, denominator((n+1)binomial(n, k)/binomial(2n, n))}

Crossrefs

Sequence in context: A136882 A136901 A136897 * A168541 A124264 A274239

Adjacent sequences: A098507 A098508 A098509 * A098511 A098512 A098513

Keyword

easy,nonn

Author

Paul Barry, Sep 11 2004

Status

approved