a(1) = 1, a(n) = Sum_{k=1..n-1} ((11^k - 1)/10)*a(k).
A015513
a(1) = 1, a(n) = Sum_{k=1..n-1} ((11^k - 1)/10)*a(k).
Terms
- a(0) =1a(1) =1a(2) =13a(3) =1742a(4) =2552030a(5) =41102995180
External references
- oeis: A015513
A015513
a(1) = 1, a(n) = Sum_{k=1..n-1} ((11^k - 1)/10)*a(k).