OFFSET
0,2
COMMENTS
FORMULA
E.g.f.: 1/(1-(3/2)x^2+(3/4)x^4-(1/8)x^6) (with interpolated zeros);
a(n) -(n+2)*(2*n-1)*a(n-1)=0. - R. J. Mathar, Nov 05 2012
MATHEMATICA
Table[(Binomial[n+2, 2](2n)!)/2^n, {n, 0, 20}] (* Harvey P. Dale, Sep 18 2011 *)
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Paul Barry, Sep 04 2007
EXTENSIONS
More terms from Harvey P. Dale, Sep 18 2011
STATUS
approved