A235400 - cp's OEIS frontend

A235400 a(1)=1. For n>1, assume a(n-1) has decimal expansion qrstuvwxyz (with at most ten digits, where some of q, r, s, ... may be zero). Then a(n) = sum 99...9 (with z 9's) + 88...8 (with y 8's) + 77...7 (with x 7's) + ... For example, if a(n-1) were 243, we would sum 77 + 8888 + 999 and get 9964.

n	a(n)
1	1
2	9
3	999999999
4	4999999995
5	4000099995
6	2888988885
7	800099995
8	2900099996
9	3000999996
10	3334333329
11	1000006195
12	889655560
13	368199996
14	2923444555
15	111394795
16	1452329335
17	666792195
18	1449655625
19	334781195
20	948992565
21	1145513395
22	889070335
23	372323885
24	168990195

[1, 9, 999999999, 4999999995, 4000099995, 2888988885, 800099995, 2900099996, 3000999996, 3334333329, 1000006195, 889655560, 368199996, 2923444555, 111394795, 1452329335, 666792195, 1449655625, 334781195, 948992565, 1145513395, 889070335, 372323885, 168990195]

cp's OEIS Frontend

A235400 a(1)=1. For n>1, assume a(n-1) has decimal expansion qrstuvwxyz (with at most ten digits, where some of q, r, s, ... may be zero). Then a(n) = sum 99...9 (with z 9's) + 88...8 (with y 8's) + 77...7 (with x 7's) + ... For example, if a(n-1) were 243, we would sum 77 + 8888 + 999 and get 9964.

Table of values

List of values