A368610 - cp's OEIS frontend

A368610 a(n) = Sum_{k=1..n} pi(k) * ceiling(n/k).

n	a(n)
1	0
2	1
3	4
4	8
5	14
6	20
7	30
8	38
9	49
10	59
11	72
12	82
13	101
14	113
15	130
16	147
17	167
18	181
19	206
20	222
21	248
22	270
23	293
24	311
25	346
26	367
27	392
28	416
29	448
30	468
31	508
32	530
33	565
34	594
35	624
36	653
37	700
38	724
39	757
40	789
41	836
42	862
43	913
44	941
45	985
46	1028
47	1067
48	1097
49	1159
50	1193
51	1240
52	1279
53	1328
54	1360
55	1418

[0, 1, 4, 8, 14, 20, 30, 38, 49, 59, 72, 82, 101, 113, 130, 147, 167, 181, 206, 222, 248, 270, 293, 311, 346, 367, 392, 416, 448, 468, 508, 530, 565, 594, 624, 653, 700, 724, 757, 789, 836, 862, 913, 941, 985, 1028, 1067, 1097, 1159, 1193, 1240, 1279, 1328, 1360, 1418]

cp's OEIS Frontend

A368610 a(n) = Sum_{k=1..n} pi(k) * ceiling(n/k).

Table of values

List of values