2963186domain: NAppears in sequencesExpansion of o.g.f. (1-x)^5/((1-x)^5 - x^4).at n=22A368475a(n) = 4*a(n-1) - 6*a(n-2) + 4*a(n-3) - a(n-4) + a(n-5) with a(1) = a(2) = a(3) = 0, a(4) = 1, and a(5) = 3.at n=27A385142