A157019 - cp's OEIS frontend

A157019 a(n) = Sum_{d|n} binomial(n/d+d-2, d-1).

n	a(n)
1	1
2	2
3	2
4	4
5	2
6	8
7	2
8	10
9	8
10	12
11	2
12	34
13	2
14	16
15	32
16	38
17	2
18	62
19	2
20	92
21	58
22	24
23	2
24	210
25	72
26	28
27	92
28	198
29	2
30	394
31	2
32	274
33	134
34	36
35	422
36	776
37	2
38	40
39	184
40	1142
41	2
42	1178
43	2
44	618
45	1232
46	48
47	2
48	2634
49	926
50	1482
51	308
52	964
53	2
54	2972
55	2004
56	4610
57	382
58	60
59	2
60	8576
61	2
62	64
63	6470
64	5130

[1, 2, 2, 4, 2, 8, 2, 10, 8, 12, 2, 34, 2, 16, 32, 38, 2, 62, 2, 92, 58, 24, 2, 210, 72, 28, 92, 198, 2, 394, 2, 274, 134, 36, 422, 776, 2, 40, 184, 1142, 2, 1178, 2, 618, 1232, 48, 2, 2634, 926, 1482, 308, 964, 2, 2972, 2004, 4610, 382, 60, 2, 8576, 2, 64, 6470, 5130]

cp's OEIS Frontend

A157019 a(n) = Sum_{d|n} binomial(n/d+d-2, d-1).

Table of values

List of values