248370211domain: NAppears in sequencesA182642(n) - A107857(n-1) for n>=1.at n=27A182643Expansion of x*(1 - x + 2*x^3 - x^4)/((1 - x)*(1 + x)*(1 - x + x^2)*(1 - x - x^2)).at n=41A279890