A072921 - cp's OEIS frontend

A072921 a(1)=1; a(n) = a(n-1) + [sum of all decimal digits present so far in the sequence].

n	a(n)
1	1
2	2
3	5
4	13
5	25
6	44
7	71
8	106
9	148
10	203
11	263
12	334
13	415
14	506
15	608
16	724
17	853
18	998
19	1169
20	1357
21	1561
22	1778
23	2018
24	2269
25	2539
26	2828
27	3137
28	3460
29	3796
30	4157
31	4535
32	4930
33	5341
34	5765
35	6212
36	6670
37	7147
38	7643
39	8159
40	8698
41	9268
42	9863
43	10484
44	11122

[1, 2, 5, 13, 25, 44, 71, 106, 148, 203, 263, 334, 415, 506, 608, 724, 853, 998, 1169, 1357, 1561, 1778, 2018, 2269, 2539, 2828, 3137, 3460, 3796, 4157, 4535, 4930, 5341, 5765, 6212, 6670, 7147, 7643, 8159, 8698, 9268, 9863, 10484, 11122]

cp's OEIS Frontend

A072921 a(1)=1; a(n) = a(n-1) + [sum of all decimal digits present so far in the sequence].

Table of values

List of values