A069533 - cp's OEIS frontend

A069533 a(n) = Sum_{p prime} floor(n^2/p^2) where the sum is over all the primes.

n	a(n)
1	0
2	1
3	3
4	5
5	9
6	14
7	19
8	26
9	33
10	42
11	50
12	60
13	71
14	83
15	96
16	110
17	124
18	139
19	157
20	175
21	192
22	210
23	231
24	252
25	274
26	297
27	321
28	345
29	369
30	398
31	423
32	451
33	483
34	512
35	544
36	573
37	606
38	639
39	675
40	710
41	745
42	785
43	822
44	863
45	902
46	943
47	986
48	1028
49	1070
50	1113
51	1161
52	1207
53	1254
54	1304

[0, 1, 3, 5, 9, 14, 19, 26, 33, 42, 50, 60, 71, 83, 96, 110, 124, 139, 157, 175, 192, 210, 231, 252, 274, 297, 321, 345, 369, 398, 423, 451, 483, 512, 544, 573, 606, 639, 675, 710, 745, 785, 822, 863, 902, 943, 986, 1028, 1070, 1113, 1161, 1207, 1254, 1304]

cp's OEIS Frontend

A069533 a(n) = Sum_{p prime} floor(n^2/p^2) where the sum is over all the primes.

Table of values

List of values