A098508 Second column of the inverse of a Catalan scaled binomial matrix.

0, 0, 1, 3, 3, 5, 5, 7, 14, 18, 45, 55, 33, 39, 91, 7, 4, 68, 51, 57, 19, 7, 77, 253, 23, 25, 325, 351, 27, 29, 435, 465, 248, 88, 187, 85, 45, 333, 703, 741, 39, 41, 41, 43, 473, 11, 23, 1081, 94, 98, 1225, 425, 221, 689, 477, 495, 385, 133, 551, 1711, 295, 305, 1891

Offset

0,4

Comments

Second column of A098505.

Links

Table of n, a(n) for n=0..62.

Formula

a(n)=numerator((n+1)binomial(n, 2)/binomial(2n, n)); a(n)=numerator((n-1)n(n+1)/(2binomial(2n, n)).

Crossrefs

Sequence in context: A327710 A339101 A142456 * A355572 A051593 A142712

Adjacent sequences: A098505 A098506 A098507 * A098509 A098510 A098511

Keyword

easy,nonn

Author

Paul Barry, Sep 11 2004

Status

approved