A102053 Column 2 of triangle A102051, which is the matrix inverse of triangle A101275 (number of Schroeder paths).

1, -7, 36, -170, 775, -3481, 15542, -69276, 308945, -1380035, 6178088, -27725806, 124743163, -562660125, 2544153290, -11530989904, 52380358293, -238450946439, 1087698574940, -4971055063490, 22760027348511, -104384818070017, 479513717931486, -2206100494746180

Offset

0,2

Links

Table of n, a(n) for n=0..23.

Formula

G.f.: 32*(1-x)^2/(1+sqrt(1+4*x-4*x^2))^5.

Prog

(PARI) {a(n)=polcoeff(32*(1-x)^2/(1+sqrt(1+4*x-4*x^2))^5, n)}

Crossrefs

Cf. A101275, A102051.

Sequence in context: A026856 A038748 A099455 * A058681 A246417 A110310

Adjacent sequences: A102050 A102051 A102052 * A102054 A102055 A102056

Keyword

sign

Author

Paul D. Hanna, Dec 27 2004

Status

approved