319516

Appears in sequences

• Number of nondecreasing -4..4 vectors of length n whose dot product with some other -4..4 vector equals n.at n=13A226336
• Triangle read by rows: T(n,m) (n >= m >= 1) = number of edges in the graph formed by drawing the line segments connecting any two of the (n+1) X (m+1) lattice points in an n X m grid of squares.at n=34A333278