83056domain: NAppears in sequencesExpansion of 1/(1-x^2-x^3-x^4-x^5-x^6-x^7).at n=27A013984For n weights, number of combinations when limited to two weights per pan.at n=29A037255a(n) = a(n-2) + a(n-3) + a(n-4) + a(n-5) + a(n-6) + a(n-7).at n=26A107479Number of twice-partitions of type (Q,P,Q) and weight n.at n=36A279790