364793domain: NAppears in sequencesNumber of nX2 1..6 arrays containing at least one of each value, all equal values connected, rows considered as a single number in nondecreasing order, and columns considered as a single number in nondecreasing order.at n=7A166799Coefficient of x^n in the expansion of 1 / (1-x-x^3)^n.at n=10A370624