37477276domain: NAppears in sequencesExpansion of (-1+3*x+2*x^2-8*x^3+3*x^5-2*x^6-2*x^7+x^8) / ((x-1)*(x+1)*(x^2-2*x-1)*(x^2+2*x-1)).at n=20A110225Number of length n+2 0..3 arrays with no pair in any consecutive three terms totalling exactly 3.at n=16A245990