A204921 - cp's OEIS frontend

A204921 a(n) = (p(n)^2 - q(n)^2)/n, where (p(n)^2, q(n)^2) is the least pair of squared primes (ordered as at A204914) for which n divides p(n)^2 - q(n)^2.

n	a(n)
1	5
2	8
3	7
4	4
5	1
6	4
7	3
8	2
9	5
10	4
11	15
12	2
13	9
14	8
15	3
16	1
17	21
18	4
19	15
20	2
21	1
22	12
23	24
24	1
25	21
26	12
27	31
28	4
29	33
30	4
31	27
32	3
33	5
34	12
35	8
36	2
37	24
38	24
39	3
40	1
41	45
42	4
43	39
44	6
45	1
46	12
47	24
48	2
49	45
50	12
51	7
52	6
53	24
54	8
55	3
56	2
57	5
58	24
59	63
60	2

[5, 8, 7, 4, 1, 4, 3, 2, 5, 4, 15, 2, 9, 8, 3, 1, 21, 4, 15, 2, 1, 12, 24, 1, 21, 12, 31, 4, 33, 4, 27, 3, 5, 12, 8, 2, 24, 24, 3, 1, 45, 4, 39, 6, 1, 12, 24, 2, 45, 12, 7, 6, 24, 8, 3, 2, 5, 24, 63, 2]

cp's OEIS Frontend

A204921 a(n) = (p(n)^2 - q(n)^2)/n, where (p(n)^2, q(n)^2) is the least pair of squared primes (ordered as at A204914) for which n divides p(n)^2 - q(n)^2.

Table of values

List of values

n	a(n)
1	5
2	8
3	7
4	4
5	1
6	4
7	3
8	2
9	5
10	4
11	15
12	2
13	9
14	8
15	3
16	1
17	21
18	4
19	15
20	2
21	1
22	12
23	24
24	1
25	21
26	12
27	31
28	4
29	33
30	4
31	27
32	3
33	5
34	12
35	8
36	2
37	24
38	24
39	3
40	1
41	45
42	4
43	39
44	6
45	1
46	12
47	24
48	2
49	45
50	12
51	7
52	6
53	24
54	8
55	3
56	2
57	5
58	24
59	63
60	2

n	a(n)
1	5
2	8
3	7
4	4
5	1
6	4
7	3
8	2
9	5
10	4
11	15
12	2
13	9
14	8
15	3
16	1
17	21
18	4
19	15
20	2
21	1
22	12
23	24
24	1
25	21
26	12
27	31
28	4
29	33
30	4
31	27
32	3
33	5
34	12
35	8
36	2
37	24
38	24
39	3
40	1
41	45
42	4
43	39
44	6
45	1
46	12
47	24
48	2
49	45
50	12
51	7
52	6
53	24
54	8
55	3
56	2
57	5
58	24
59	63
60	2

n	a(n)
1	5
2	8
3	7
4	4
5	1
6	4
7	3
8	2
9	5
10	4
11	15
12	2
13	9
14	8
15	3
16	1
17	21
18	4
19	15
20	2
21	1
22	12
23	24
24	1
25	21
26	12
27	31
28	4
29	33
30	4
31	27
32	3
33	5
34	12
35	8
36	2
37	24
38	24
39	3
40	1
41	45
42	4
43	39
44	6
45	1
46	12
47	24
48	2
49	45
50	12
51	7
52	6
53	24
54	8
55	3
56	2
57	5
58	24
59	63
60	2