9312342245domain: NAppears in sequencesExpansion of (1 - x)/(1 - 2*x - x^3).at n=30A052980Expansion of (1 + x)/(1 + 2x + x^3).at n=30A110513Number of one-sided n-step prudent walks, avoiding single west step only, i.e., two or more consecutive west steps are permitted.at n=29A190512