152304

Appears in sequences

• Number of n X 2 0..2 arrays with values 0..2 introduced in row major order and each element equal to one or two horizontal and vertical neighbors.at n=8A199641
• T(n,k)=Number of nXk 0..2 arrays with values 0..2 introduced in row major order and each element equal to one or two horizontal and vertical neighbors.at n=46A199647
• a(n) = Sum_{k=0..floor(2*n/7)} binomial(2*k,2*n-7*k).at n=41A392430