21836929

Appears in sequences

• Number of binary arrangements without adjacent 1's on n X n array connected ne-sw and nw-se.at n=5A067965
• Squares with property that digits alternate in parity individually as well as in concatenation with previous terms.at n=34A068888
• Number of nX6 binary matrices with no two 1's adjacent diagonally or antidiagonally.at n=5A181210