769895

Appears in sequences

• Number of n X n binary arrays with all ones connected only in a 1110-1111 pattern in any orientation.at n=7A146738
• Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 1110-1111 pattern in any orientation.at n=16A146740
• Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 1110-1111 pattern in any orientation.at n=17A146740
• 24*a(n)+1 is the numerator of the squared circumradius of a cyclic quadrilateral with sides n, n+1, n+2, n+3.at n=12A351698