5374978562

Appears in sequences

• a(n+3) = 3*a(n+2) + 5*a(n+1) + a(n), a(0) = 1, a(1) = 10, a(2) = 37.at n=15A110528
• Half the number of n X 2 binary arrays with every element equal to exactly one or two of its horizontal and vertical neighbors.at n=23A185828
• A modified Engel expansion of the golden ratio (1/2)*(1 + sqrt(5)) (A001622).at n=15A220398