A085683 - cp's OEIS frontend

A085683 a(n) = Sum_{k = 1..N-1} floor(N/k) where N is the n-th prime.

n	a(n)
1	2
2	4
3	9
4	15
5	28
6	36
7	51
8	59
9	75
10	102
11	112
12	141
13	159
14	169
15	187
16	218
17	248
18	262
19	293
20	313
21	327
22	357
23	378
24	412
25	460
26	483
27	493
28	515
29	529
30	553
31	636
32	658
33	696
34	706
35	767
36	781
37	821
38	857
39	877
40	918
41	952
42	972
43	1032
44	1048
45	1071
46	1085
47	1167
48	1239
49	1266
50	1280
51	1306
52	1342
53	1364
54	1422

[2, 4, 9, 15, 28, 36, 51, 59, 75, 102, 112, 141, 159, 169, 187, 218, 248, 262, 293, 313, 327, 357, 378, 412, 460, 483, 493, 515, 529, 553, 636, 658, 696, 706, 767, 781, 821, 857, 877, 918, 952, 972, 1032, 1048, 1071, 1085, 1167, 1239, 1266, 1280, 1306, 1342, 1364, 1422]

cp's OEIS Frontend

A085683 a(n) = Sum_{k = 1..N-1} floor(N/k) where N is the n-th prime.

Table of values

List of values