A098431 Constant terms of polynomials in A098277.

1, 2, 12, 168, 4272, 171168, 9915072, 783454848, 80965577472, 10599312542208, 1714108476337152, 335566486059952128, 78206210287187177472, 21396344618478777704448, 6790389880757556630700032

Offset: 0

Author

Ralf Stephan, Sep 07 2004

Keywords

• nonn

Formula

G.f. 1/G(0) where G(k) = 1 - x*(2*k+1)*(2*k+2)/(1 - (2*k+2)^2*x/G(k+1)); (continued fraction, 2-step). - Sergei N. Gladkovskii, Aug 11 2012