206715

Appears in sequences

• Number of (n+1) X (3+1) 0..1 arrays with no 2 X 2 subblock having zero or two 1s.at n=6A251214
• Number of (n+1)X(7+1) 0..1 arrays with no 2X2 subblock having zero or two 1s.at n=2A251218
• T(n,k)=Number of (n+1)X(k+1) 0..1 arrays with no 2X2 subblock having zero or two 1s.at n=38A251219
• T(n,k)=Number of (n+1)X(k+1) 0..1 arrays with no 2X2 subblock having zero or two 1s.at n=42A251219
• Expansion of the o.g.f. A(x) defined by [x^n] A(x)^(6*n) = (3*n)!/n!^3 for n >= 0.at n=7A377217