A291540 - cp's OEIS frontend

A291540 a(n) = PrimePi(n) * PrimePi(n^2) - PrimePi(n)^3, where PrimePi = A000720.

n	a(n)
1	0
2	1
3	0
4	4
5	0
6	6
7	-4
8	8
9	24
10	36
11	25
12	45
13	18
14	48
15	72
16	108
17	84
18	119
19	64
20	112
21	168
22	224
23	162
24	216
25	297
26	369
27	432
28	504
29	460
30	540
31	451
32	561
33	660
34	770
35	869
36	979
37	900
38	1008
39	1152
40	1284
41	1222
42	1365
43	1218
44	1386
45	1540
46	1722
47	1560
48	1755
49	1980
50	2130
51	2295
52	2520
53	2448
54	2640
55	2848
56	3024
57	3216
58	3488
59	3366
60	3638
61	3510
62	3744
63	4050
64	4320
65	4572

[0, 1, 0, 4, 0, 6, -4, 8, 24, 36, 25, 45, 18, 48, 72, 108, 84, 119, 64, 112, 168, 224, 162, 216, 297, 369, 432, 504, 460, 540, 451, 561, 660, 770, 869, 979, 900, 1008, 1152, 1284, 1222, 1365, 1218, 1386, 1540, 1722, 1560, 1755, 1980, 2130, 2295, 2520, 2448, 2640, 2848, 3024, 3216, 3488, 3366, 3638, 3510, 3744, 4050, 4320, 4572]

cp's OEIS Frontend

A291540 a(n) = PrimePi(n) * PrimePi(n^2) - PrimePi(n)^3, where PrimePi = A000720.

Table of values

List of values