195927

Appears in sequences

• Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 0100-0100-1111-0010-0010 pattern in any orientation.at n=19A147344
• Number of length n+1 0..4 arrays with the sum of adjacent differences multiplied by some arrangement of +-1 equal to zero.at n=6A250163
• T(n,k)=Number of length n+1 0..k arrays with the sum of adjacent differences multiplied by some arrangement of +-1 equal to zero.at n=51A250167
• Number of length 7+1 0..n arrays with the sum of adjacent differences multiplied by some arrangement of +-1 equal to zero.at n=3A250172