54724

Appears in sequences

• Area under Dyck paths.at n=11A057571
• Number of (n+1)X4 0..3 arrays with each element of every 2X2 subblock being the sum mod 4 of two others.at n=3A183848
• Number of (n+1)X5 0..3 arrays with each element of every 2X2 subblock being the sum mod 4 of two others.at n=2A183849
• T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with each element of every 2X2 subblock being the sum mod 4 of two others.at n=17A183854
• T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with each element of every 2X2 subblock being the sum mod 4 of two others.at n=18A183854
• G.f. A(x) satisfies A(x) = ( (1 + x*A(x))/(1 - x*A(x)^2) )^2.at n=5A379251