2937120domain: NAppears in sequencesExpansion of x*(1+x)/(1-x-2*x^2-2*x^3-x^4).at n=18A210460Expansion of (1 + x + x^3)/(1 - x^2 - 2*x^4 - 2*x^6 + x^8).at n=37A363958