1245641

Appears in sequences

• Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 1001-1001-1111 pattern in any orientation.at n=13A147406
• 1/12 the number of (n+2)X5 0..2 arrays with each 3X3 subblock containing three of each value.at n=6A184380
• 1/12 the number of (n+2)X9 0..2 arrays with each 3X3 subblock containing three of each value.at n=2A184384