A333613 - cp's OEIS frontend

A333613 a(1) = 1; thereafter a(n) = Sum_{k = 1..n} a(k/gcd(n,k)).

n	a(n)
1	1
2	2
3	4
4	7
5	15
6	21
7	51
8	78
9	158
10	230
11	568
12	661
13	1797
14	2595
15	5117
16	7789
17	19095
18	21702
19	59892
20	81801
21	171329
22	258028
23	630942
24	713093
25	1887828
26	2776798
27	5727675
28	8335692
29	20702970
30	21420664
31	62826604
32	92041835
33	189376593
34	281410640
35	656577018
36	742729123
37	2087788417

[1, 2, 4, 7, 15, 21, 51, 78, 158, 230, 568, 661, 1797, 2595, 5117, 7789, 19095, 21702, 59892, 81801, 171329, 258028, 630942, 713093, 1887828, 2776798, 5727675, 8335692, 20702970, 21420664, 62826604, 92041835, 189376593, 281410640, 656577018, 742729123, 2087788417]

cp's OEIS Frontend

A333613 a(1) = 1; thereafter a(n) = Sum_{k = 1..n} a(k/gcd(n,k)).

Table of values

List of values