a(0)=1, a(1)=6, a(n) = sum_{k=0}^{k=n-1} 6^k a(k).

A015492

a(0)=1, a(1)=6, a(n) = sum_{k=0}^{k=n-1} 6^k a(k).

Terms

    a(0) =1a(1) =6a(2) =37a(3) =1369a(4) =297073a(5) =385303681

External references