A351621 - cp's OEIS frontend

A351621 a(1) = 1; a(n) = 1 + a(n-1) + Sum_{k=2..n} a(floor(n/k)).

n	a(n)
1	1
2	3
3	6
4	12
5	19
6	32
7	46
8	69
9	96
10	133
11	171
12	234
13	298
14	379
15	471
16	595
17	720
18	891
19	1063
20	1288
21	1531
22	1815
23	2100
24	2496
25	2900
26	3371
27	3873
28	4479
29	5086
30	5848
31	6611
32	7530
33	8491
34	9580
35	10691
36	12088
37	13486
38	15059
39	16700
40	18642
41	20585
42	22885
43	25186
44	27818
45	30580
46	33630
47	36681
48	40363
49	44060
50	48208

[1, 3, 6, 12, 19, 32, 46, 69, 96, 133, 171, 234, 298, 379, 471, 595, 720, 891, 1063, 1288, 1531, 1815, 2100, 2496, 2900, 3371, 3873, 4479, 5086, 5848, 6611, 7530, 8491, 9580, 10691, 12088, 13486, 15059, 16700, 18642, 20585, 22885, 25186, 27818, 30580, 33630, 36681, 40363, 44060, 48208]

cp's OEIS Frontend

A351621 a(1) = 1; a(n) = 1 + a(n-1) + Sum_{k=2..n} a(floor(n/k)).

Table of values

List of values