2301877domain: NPropertiesPrimalityPrimeyesAppears in sequencesNumber of nonzero n X n binary arrays with all 1's connected.at n=5A059525Array read by antidiagonals: T(m,n) = number of nonzero m X n binary arrays with all 1's connected.at n=40A287151Number of nonzero 5 X n binary arrays with all 1's connected.at n=5A378940Prime numbersat n=169652