132005domain: NAppears in sequencesNumber of n X n binary arrays symmetric about the diagonal and under 90 degree rotation with all ones connected only in a 10001-11111 pattern in any orientation.at n=26A147088G.f. satisfies A(x) = x + x*A(A(A(A(A(x))))), so that this sequence shifts left under the 5th self-COMPOSE.at n=6A378575