A351788 - cp's OEIS frontend

A351788 a(1) = 1; a(n) = a(n-1) + Sum_{d|n, 1 < d < n} a(n/d) * a(d).

n	a(n)
1	1
2	1
3	1
4	2
5	2
6	4
7	4
8	8
9	9
10	13
11	13
12	25
13	25
14	33
15	37
16	57
17	57
18	83
19	83
20	117
21	125
22	151
23	151
24	233
25	237
26	287
27	305
28	387
29	387
30	503
31	503
32	649
33	675
34	789
35	805
36	1073
37	1073
38	1239
39	1289
40	1607
41	1607
42	1955
43	1955
44	2309
45	2419
46	2721
47	2721
48	3465
49	3481
50	4007
51	4121
52	4795
53	4795
54	5643
55	5695

[1, 1, 1, 2, 2, 4, 4, 8, 9, 13, 13, 25, 25, 33, 37, 57, 57, 83, 83, 117, 125, 151, 151, 233, 237, 287, 305, 387, 387, 503, 503, 649, 675, 789, 805, 1073, 1073, 1239, 1289, 1607, 1607, 1955, 1955, 2309, 2419, 2721, 2721, 3465, 3481, 4007, 4121, 4795, 4795, 5643, 5695]

cp's OEIS Frontend

A351788 a(1) = 1; a(n) = a(n-1) + Sum_{d|n, 1 < d < n} a(n/d) * a(d).

Table of values

List of values