A338655 - cp's OEIS frontend

A338655 a(n) = Sum_{d|n} phi(d) * binomial(d+n/d-1, d).

n	a(n)
1	1
2	3
3	5
4	9
5	9
6	22
7	13
8	32
9	35
10	53
11	21
12	121
13	25
14	96
15	177
16	166
17	33
18	297
19	37
20	491
21	417
22	218
23	45
24	1002
25	549
26	297
27	705
28	1375
29	57
30	2418
31	61
32	1640
33	1405
34	491
35	3887
36	4659
37	73
38	606
39	2233
40	8156
41	81
42	8989
43	85
44	6189
45	11955
46	872
47	93
48	16550
49	10387
50	12927
51	4757
52	11111
53	105
54	22392
55	25757

[1, 3, 5, 9, 9, 22, 13, 32, 35, 53, 21, 121, 25, 96, 177, 166, 33, 297, 37, 491, 417, 218, 45, 1002, 549, 297, 705, 1375, 57, 2418, 61, 1640, 1405, 491, 3887, 4659, 73, 606, 2233, 8156, 81, 8989, 85, 6189, 11955, 872, 93, 16550, 10387, 12927, 4757, 11111, 105, 22392, 25757]

cp's OEIS Frontend

A338655 a(n) = Sum_{d|n} phi(d) * binomial(d+n/d-1, d).

Table of values

List of values