491045

Appears in sequences

• Number of n X 2 binary arrays with all 1s connected, a path of 1s from upper left corner to lower right corner, and no 1 having more than two 1s adjacent.at n=26A163685
• Numerators of A178381(4*n+1)/A178381(4*n).at n=13A179131
• If a(n) is prime then a(n+1) = a(n)^2+9, otherwise a(n+1) = floor(a(n)/2), with a(1) = 2.at n=9A307655