303016domain: NAppears in sequencesa(n) = Sum_{k=0..2*n} (k+1)*T(n, 2*n-k), T given by A027960.at n=13A027982Number of nX4 0..2 arrays with no element equal to more than one of its king-move neighbors, with the exception of exactly one element, and with new values introduced in order 0 sequentially upwards.at n=9A281135