A351620 - cp's OEIS frontend

A351620 a(1) = 1; a(n) = a(n-1) + Sum_{k=2..n} a(floor(n/k)).

n	a(n)
1	1
2	2
3	4
4	8
5	13
6	22
7	32
8	48
9	67
10	93
11	120
12	164
13	209
14	266
15	331
16	418
17	506
18	626
19	747
20	905
21	1076
22	1276
23	1477
24	1755
25	2039
26	2370
27	2723
28	3149
29	3576
30	4112
31	4649
32	5295
33	5971
34	6737
35	7519
36	8501
37	9484
38	10590
39	11744
40	13109
41	14475
42	16092
43	17710
44	19561
45	21504
46	23650
47	25797
48	28386
49	30986
50	33903

[1, 2, 4, 8, 13, 22, 32, 48, 67, 93, 120, 164, 209, 266, 331, 418, 506, 626, 747, 905, 1076, 1276, 1477, 1755, 2039, 2370, 2723, 3149, 3576, 4112, 4649, 5295, 5971, 6737, 7519, 8501, 9484, 10590, 11744, 13109, 14475, 16092, 17710, 19561, 21504, 23650, 25797, 28386, 30986, 33903]

cp's OEIS Frontend

A351620 a(1) = 1; a(n) = a(n-1) + Sum_{k=2..n} a(floor(n/k)).

Table of values

List of values