A015512 - cp's OEIS frontend

A015512 a(1) = 1, a(n) = Sum_{k=1..n-1} ((10^k - 1)/9)*a(k).

n	a(n)
1	1
2	1
3	12
4	1344
5	1494528
6	16607195136
7	1845258665951232
8	2050289046842405289984
9	22780991231839211526404702208
10	2531221268231904597902043824359735296
11	2812468078063201791652852780757078172764209152

[1, 1, 12, 1344, 1494528, 16607195136, 1845258665951232, 2050289046842405289984, 22780991231839211526404702208, 2531221268231904597902043824359735296, 2812468078063201791652852780757078172764209152]

cp's OEIS Frontend

A015512 a(1) = 1, a(n) = Sum_{k=1..n-1} ((10^k - 1)/9)*a(k).

Table of values

List of values