403486

Appears in sequences

• Number of (n+1) X (1+1) 0..4 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 4, with no adjacent elements equal (constant-stress tilted 1 X 1 tilings).at n=11A235080
• Number of move sequences of length 2n on the "8 Puzzle" which leave the final state unchanged when the empty cell starts in a corner.at n=8A343146