A262707 - cp's OEIS frontend

A262707 Positive integers m such that pi(k^2)*pi(m^2) is a square for some 1 < k < m, where pi(x) denotes the number of primes not exceeding x.

n	a(n)
1	5
2	8
3	10
4	14
5	16
6	19
7	23
8	31
9	35
10	39
11	45
12	63
13	65
14	66
15	68
16	71
17	74
18	82
19	87
20	92
21	94
22	115
23	130
24	145
25	151
26	162
27	172
28	204
29	250
30	279
31	292
32	304
33	334
34	391
35	413
36	415
37	418
38	449
39	451
40	454
41	461
42	499
43	514
44	524
45	552
46	557
47	626
48	664
49	676
50	683
51	691
52	706
53	708
54	724
55	763
56	766
57	846
58	848
59	858
60	866

[5, 8, 10, 14, 16, 19, 23, 31, 35, 39, 45, 63, 65, 66, 68, 71, 74, 82, 87, 92, 94, 115, 130, 145, 151, 162, 172, 204, 250, 279, 292, 304, 334, 391, 413, 415, 418, 449, 451, 454, 461, 499, 514, 524, 552, 557, 626, 664, 676, 683, 691, 706, 708, 724, 763, 766, 846, 848, 858, 866]

cp's OEIS Frontend

A262707 Positive integers m such that pi(k^2)*pi(m^2) is a square for some 1 < k < m, where pi(x) denotes the number of primes not exceeding x.

Table of values

List of values

n	a(n)
1	5
2	8
3	10
4	14
5	16
6	19
7	23
8	31
9	35
10	39
11	45
12	63
13	65
14	66
15	68
16	71
17	74
18	82
19	87
20	92
21	94
22	115
23	130
24	145
25	151
26	162
27	172
28	204
29	250
30	279
31	292
32	304
33	334
34	391
35	413
36	415
37	418
38	449
39	451
40	454
41	461
42	499
43	514
44	524
45	552
46	557
47	626
48	664
49	676
50	683
51	691
52	706
53	708
54	724
55	763
56	766
57	846
58	848
59	858
60	866

n	a(n)
1	5
2	8
3	10
4	14
5	16
6	19
7	23
8	31
9	35
10	39
11	45
12	63
13	65
14	66
15	68
16	71
17	74
18	82
19	87
20	92
21	94
22	115
23	130
24	145
25	151
26	162
27	172
28	204
29	250
30	279
31	292
32	304
33	334
34	391
35	413
36	415
37	418
38	449
39	451
40	454
41	461
42	499
43	514
44	524
45	552
46	557
47	626
48	664
49	676
50	683
51	691
52	706
53	708
54	724
55	763
56	766
57	846
58	848
59	858
60	866

n	a(n)
1	5
2	8
3	10
4	14
5	16
6	19
7	23
8	31
9	35
10	39
11	45
12	63
13	65
14	66
15	68
16	71
17	74
18	82
19	87
20	92
21	94
22	115
23	130
24	145
25	151
26	162
27	172
28	204
29	250
30	279
31	292
32	304
33	334
34	391
35	413
36	415
37	418
38	449
39	451
40	454
41	461
42	499
43	514
44	524
45	552
46	557
47	626
48	664
49	676
50	683
51	691
52	706
53	708
54	724
55	763
56	766
57	846
58	848
59	858
60	866