71082

Appears in sequences

• Number of (n+1) X (5+1) 0..1 arrays with every 2 X 2 subblock diagonal minimum minus antidiagonal minimum nondecreasing horizontally and diagonal maximum minus antidiagonal maximum nondecreasing vertically.at n=9A253228
• Triangle read by rows: T(n,k) (n >= 1, 1 <= k <= n) = number of normalized 2n-plets, with single or double steps, associated to trees with k edges.at n=39A294440