128316domain: NAppears in sequencesCoefficient of x^n in g.f.^n is A004123(n).at n=7A088222Number of nX7 0..1 arrays with every element equal to 2 or 3 king-move adjacent elements, with upper left element zero.at n=15A297813a(n) = Sum_{k=0..n} floor((k/2)^2)*n^2. Row sums of A391996.at n=17A391997