a(1)=1, a(n) = 18*a(n-1) + n.
A014901
a(1)=1, a(n) = 18*a(n-1) + n.
Terms
- a(0) =1a(1) =20a(2) =363a(3) =6538a(4) =117689a(5) =2118408a(6) =38131351a(7) =686364326a(8) =12354557877a(9) =222382041796
External references
- oeis: A014901
A014901
a(1)=1, a(n) = 18*a(n-1) + n.