252307

Appears in sequences

• Number of n X n binary arrays with all ones connected only in a 1000-1111-0010-0010 pattern in any orientation.at n=8A147170
• Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 1000-1111-0010-0010 pattern in any orientation.at n=18A147172
• Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 1000-1111-0010-0010 pattern in any orientation.at n=19A147172
• a(n) = 1 + Sum_{k=1..n-3} a(k) * a(n-k-3).at n=27A346075