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A098431 Constant terms of polynomials in A098277. 1
1, 2, 12, 168, 4272, 171168, 9915072, 783454848, 80965577472, 10599312542208, 1714108476337152, 335566486059952128, 78206210287187177472, 21396344618478777704448, 6790389880757556630700032 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..14.

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

CROSSREFS

Sequence in context: A255163 A052728 A052729 * A231085 A059522 A271857

Adjacent sequences:  A098428 A098429 A098430 * A098432 A098433 A098434

KEYWORD

nonn

AUTHOR

Ralf Stephan, Sep 07 2004

STATUS

approved

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Last modified February 17 18:14 EST 2020. Contains 332005 sequences. (Running on oeis4.)