a(1)=1, a(n) = n*15^(n-1) + a(n-1).
A014930
a(1)=1, a(n) = n*15^(n-1) + a(n-1).
Terms
- a(0) =1a(1) =31a(2) =706a(3) =14206a(4) =267331a(5) =4823581a(6) =84557956a(7) =1451432956a(8) =24517448581a(9) =408951042331
External references
- oeis: A014930
A014930
a(1)=1, a(n) = n*15^(n-1) + a(n-1).