204020

Appears in sequences

• Expansion of (1-x)/(1 - 3*x - 2*x^2).at n=10A104934
• Number of n X 4 0..1 arrays with new values 0..1 introduced in row major order and no element equal to more than two of its immediate leftward or upward or right-upward antidiagonal neighbors.at n=4A208705
• T(n,k)=Number of nXk 0..1 arrays with new values 0..1 introduced in row major order and no element equal to more than two of its immediate leftward or upward or right-upward antidiagonal neighbors.at n=32A208709
• Number of 5Xn 0..1 arrays with new values 0..1 introduced in row major order and no element equal to more than two of its immediate leftward or upward or right-upward antidiagonal neighbors.at n=3A208712
• a(n) is the smallest k such that A345699(k) = n.at n=27A345763