3359384domain: NAppears in sequencesG.f. = 1-1/H(x) where H(x) = 1 + 2*x + 6*x^2 + 22*x^3 + 92*x^4 + 422*x^5 + 2074*x^6 + ... is a g.f. for the Baxter sequence A001181 with a different offset.at n=11A342282Number of friendly 3-watermelons of length n.at n=11A342284