579739960domain: NAppears in sequencesG.f. satisfies A(x) = f(x) + x*A(x)*f(x)^3, where f(x) = Sum_{k>=0} x^((4^k-1)/3).at n=21A087223Number of compositions (ordered partitions) of n into squares dividing n.at n=64A294105Number of compositions (ordered partitions) of 4^n into powers of 4.at n=3A346565