119420

Appears in sequences

• Number of 6 X n binary arrays without the pattern 0 1 diagonally, vertically, antidiagonally or horizontally.at n=21A188557
• Number of (w,x,y,z) with all terms in {1,...,n} and |w-x|>|x-y|+|y-z|.at n=28A212573
• Number of (n+1) X (2+1) 0..2 arrays with no 2 X 2 subblock having the sum of its diagonal elements greater than the absolute difference of its antidiagonal elements.at n=10A251082