201549domain: NAppears in sequencesNumber of n X n binary arrays with all ones connected only in a 1000-1000-1111-0001 pattern in any orientation.at n=8A147269Square array A(n,k) = A341527(A246278(n,k)), read by falling antidiagonals; denominators of the columnwise first quotients of A341605/A341606.at n=43A341627