A015511 - cp's OEIS frontend

A015511 a(1) = 1, a(n) = Sum_{k=1..n-1} ((9^k - 1)/8)*a(k).

n	a(n)
1	1
2	1
3	11
4	1012
5	830852
6	6133349464
7	407444538242984
8	243599680968409330048
9	1310771150941736627904810368
10	63477451180042308935531134194562816
11	27666523379269090447091129488519658150671616

[1, 1, 11, 1012, 830852, 6133349464, 407444538242984, 243599680968409330048, 1310771150941736627904810368, 63477451180042308935531134194562816, 27666523379269090447091129488519658150671616]

cp's OEIS Frontend

A015511 a(1) = 1, a(n) = Sum_{k=1..n-1} ((9^k - 1)/8)*a(k).

Table of values

List of values