203424

Appears in sequences

• a(n) = T(2n,n), where T is the array defined in A025564.at n=8A025570
• a(n) = T(n,[ n/2 ]), where T is the array defined in A025564.at n=16A025575
• Number of n X 2 nonnegative integer arrays with upper left 0 and lower right n+2-6 and value increasing by 0 or 1 with every step right or down.at n=14A252924