112126domain: NAppears in sequencesExpansion of Product_{k>=1} ((1 + x^k) / (1 + x^(2*k)))^k.at n=28A285289Number of nX3 0..1 arrays with every element unequal to 0, 1, 2, 4 or 6 king-move adjacent elements, with upper left element zero.at n=13A304474