860854

Appears in sequences

• Number of -5..5 arrays x(0..n-1) of n elements with zero sum and no two consecutive zero elements.at n=6A199527
• Number of -n..n arrays x(0..6) of 7 elements with zero sum and no two consecutive zero elements.at n=4A199534
• Number of (n+2) X 4 0..1 matrices with each 3 X 3 subblock idempotent.at n=26A224553