A068336 - cp's OEIS frontend

A068336 a(1) = 1; a(n+1) = 1 + sum{k|n} a(k), sum is over the positive divisors, k, of n.

n	a(n)
1	1
2	2
3	4
4	6
5	10
6	12
7	20
8	22
9	32
10	38
11	52
12	54
13	80
14	82
15	106
16	122
17	154
18	156
19	208
20	210
21	268
22	294
23	350
24	352
25	454
26	466
27	550
28	588
29	700
30	702
31	876
32	878
33	1032
34	1090
35	1248
36	1280
37	1548
38	1550
39	1762
40	1848
41	2138
42	2140
43	2530
44	2532
45	2888
46	3042
47	3396
48	3398
49	3974
50	3996
51	4502

[1, 2, 4, 6, 10, 12, 20, 22, 32, 38, 52, 54, 80, 82, 106, 122, 154, 156, 208, 210, 268, 294, 350, 352, 454, 466, 550, 588, 700, 702, 876, 878, 1032, 1090, 1248, 1280, 1548, 1550, 1762, 1848, 2138, 2140, 2530, 2532, 2888, 3042, 3396, 3398, 3974, 3996, 4502]

cp's OEIS Frontend

A068336 a(1) = 1; a(n+1) = 1 + sum{k|n} a(k), sum is over the positive divisors, k, of n.

Table of values

List of values