66021

Appears in sequences

• a(n+1) = Sum_{k = 0..floor(2*n/3)} a(k)*a(n-k) for n >= 0 with a(0) = 1.at n=16A030033
• Triangle read by rows: T(n,k) is number of (n-k) X k matrices, k=0..n, with nonnegative integer entries and every row and column sum <= 2.at n=49A131235
• Triangle read by rows: T(n,k) is number of (n-k) X k matrices, k=0..n, with nonnegative integer entries and every row and column sum <= 2.at n=50A131235
• Number of n X (n+1) matrices with nonnegative integer entries and every row and column sum <= 2.at n=4A131237