A263721 - cp's OEIS frontend

A263721 The prime p in the Fouvry-Iwaniec prime k^2 + p^2 (A185086), or the larger of k and p if both are prime.

n	a(n)
1	2
2	3
3	5
4	5
5	7
6	5
7	3
8	5
9	3
10	7
11	11
12	7
13	11
14	13
15	7
16	2
17	13
18	13
19	5
20	17
21	13
22	11
23	5
24	17
25	7
26	17
27	19
28	3
29	17
30	7
31	19
32	5
33	11
34	19
35	13
36	23
37	5
38	17
39	19
40	13
41	23
42	5
43	2
44	19
45	17
46	11
47	5
48	23
49	29
50	29
51	23
52	19
53	29
54	13
55	31
56	31
57	23
58	11
59	3
60	5
61	31
62	13
63	2
64	29
65	5
66	13
67	31
68	2
69	11
70	5
71	31
72	37
73	23
74	37
75	3
76	7
77	23
78	3
79	13
80	31
81	19
82	37
83	41
84	11

[2, 3, 5, 5, 7, 5, 3, 5, 3, 7, 11, 7, 11, 13, 7, 2, 13, 13, 5, 17, 13, 11, 5, 17, 7, 17, 19, 3, 17, 7, 19, 5, 11, 19, 13, 23, 5, 17, 19, 13, 23, 5, 2, 19, 17, 11, 5, 23, 29, 29, 23, 19, 29, 13, 31, 31, 23, 11, 3, 5, 31, 13, 2, 29, 5, 13, 31, 2, 11, 5, 31, 37, 23, 37, 3, 7, 23, 3, 13, 31, 19, 37, 41, 11]

cp's OEIS Frontend

A263721 The prime p in the Fouvry-Iwaniec prime k^2 + p^2 (A185086), or the larger of k and p if both are prime.

Table of values

List of values

n	a(n)
1	2
2	3
3	5
4	5
5	7
6	5
7	3
8	5
9	3
10	7
11	11
12	7
13	11
14	13
15	7
16	2
17	13
18	13
19	5
20	17
21	13
22	11
23	5
24	17
25	7
26	17
27	19
28	3
29	17
30	7
31	19
32	5
33	11
34	19
35	13
36	23
37	5
38	17
39	19
40	13
41	23
42	5
43	2
44	19
45	17
46	11
47	5
48	23
49	29
50	29
51	23
52	19
53	29
54	13
55	31
56	31
57	23
58	11
59	3
60	5
61	31
62	13
63	2
64	29
65	5
66	13
67	31
68	2
69	11
70	5
71	31
72	37
73	23
74	37
75	3
76	7
77	23
78	3
79	13
80	31
81	19
82	37
83	41
84	11

n	a(n)
1	2
2	3
3	5
4	5
5	7
6	5
7	3
8	5
9	3
10	7
11	11
12	7
13	11
14	13
15	7
16	2
17	13
18	13
19	5
20	17
21	13
22	11
23	5
24	17
25	7
26	17
27	19
28	3
29	17
30	7
31	19
32	5
33	11
34	19
35	13
36	23
37	5
38	17
39	19
40	13
41	23
42	5
43	2
44	19
45	17
46	11
47	5
48	23
49	29
50	29
51	23
52	19
53	29
54	13
55	31
56	31
57	23
58	11
59	3
60	5
61	31
62	13
63	2
64	29
65	5
66	13
67	31
68	2
69	11
70	5
71	31
72	37
73	23
74	37
75	3
76	7
77	23
78	3
79	13
80	31
81	19
82	37
83	41
84	11

n	a(n)
1	2
2	3
3	5
4	5
5	7
6	5
7	3
8	5
9	3
10	7
11	11
12	7
13	11
14	13
15	7
16	2
17	13
18	13
19	5
20	17
21	13
22	11
23	5
24	17
25	7
26	17
27	19
28	3
29	17
30	7
31	19
32	5
33	11
34	19
35	13
36	23
37	5
38	17
39	19
40	13
41	23
42	5
43	2
44	19
45	17
46	11
47	5
48	23
49	29
50	29
51	23
52	19
53	29
54	13
55	31
56	31
57	23
58	11
59	3
60	5
61	31
62	13
63	2
64	29
65	5
66	13
67	31
68	2
69	11
70	5
71	31
72	37
73	23
74	37
75	3
76	7
77	23
78	3
79	13
80	31
81	19
82	37
83	41
84	11