OFFSET
1,4
FORMULA
D-finite with recurrence: +(n+1)*a(n) +(-5*n+1)*a(n-1) +4*(n-2)*a(n-2) +8*(n-2)*a(n-3) +(-5*n+31)*a(n-4) +3*(-n+5)*a(n-5)=0. - R. J. Mathar, Jun 12 2015
MAPLE
(1-x)*(1-2*x-x^2-(1-x)*sqrt(1-2*x-3*x^2))/(2*x*(1-2*x-x^2)) ;
taylor(%, x=0, 40) ;
gfun[seriestolist](%) ; # R. J. Mathar, Jun 12 2015
CROSSREFS
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Jun 04 2015
STATUS
approved