321402domain: NAppears in sequencesWeight distribution of [138,69,22] binary extended quadratic-residue (or QR) code.at n=11A097937Number of (n+2) X (6+2) 0..1 arrays with each 3 X 3 subblock having clockwise perimeter pattern 00010101 or 01010101.at n=7A259740a(n) = n*(2*n + 1)*(4*n + 1).at n=34A316224