188418domain: NAppears in sequencesa(n) = 196*n^2 + 2*n.at n=30A158222Number of (n+2) X 3 binary arrays avoiding patterns 000 and 111 in rows, columns and nw-to-se diagonals.at n=8A202640Expansion of (Product_{k>0} (1 - x^(3*k)) / (1 - x^k))^3 in powers of x.at n=22A285927