-38613965domain: ZAppears in sequencesExpansion of 2+(1-2*x)/(-1+2*x+x^2).at n=22A176981a(n+8)+34*a(n+4)+a(n)=0 with a(0)-a(7) as shown.at n=20A259860a(n+8)+34*a(n+4)+a(n)=0 with a(0)-a(7) as shown.at n=19A259861