A182199 - cp's OEIS frontend

A182199 Largest integer N such that a^(2^k) + b^(2^k) for 1 <= k <= N is prime, where p = a^2 + b^2 is the n-th prime of the form 4m+1.

n	a(n)
1	4
2	2
3	3
4	2
5	2
6	2
7	2
8	1
9	2
10	2
11	1
12	1
13	1
14	1
15	2
16	2
17	2
18	1
19	2
20	1
21	1
22	1
23	1
24	1
25	2
26	2
27	1
28	2
29	2
30	2
31	1
32	1
33	2
34	1
35	2
36	1
37	2
38	2
39	2
40	2
41	1
42	1
43	1
44	2
45	1
46	1
47	2
48	2
49	1
50	2
51	2
52	1
53	1
54	1
55	1
56	1
57	2
58	1
59	1
60	1
61	2
62	2
63	2
64	1
65	2
66	2
67	2
68	1
69	1
70	1
71	2
72	1
73	1
74	1
75	1
76	2
77	1
78	2
79	1
80	1
81	1
82	1
83	2
84	1
85	2
86	1
87	2

[4, 2, 3, 2, 2, 2, 2, 1, 2, 2, 1, 1, 1, 1, 2, 2, 2, 1, 2, 1, 1, 1, 1, 1, 2, 2, 1, 2, 2, 2, 1, 1, 2, 1, 2, 1, 2, 2, 2, 2, 1, 1, 1, 2, 1, 1, 2, 2, 1, 2, 2, 1, 1, 1, 1, 1, 2, 1, 1, 1, 2, 2, 2, 1, 2, 2, 2, 1, 1, 1, 2, 1, 1, 1, 1, 2, 1, 2, 1, 1, 1, 1, 2, 1, 2, 1, 2]

cp's OEIS Frontend

A182199 Largest integer N such that a^(2^k) + b^(2^k) for 1 <= k <= N is prime, where p = a^2 + b^2 is the n-th prime of the form 4m+1.

Table of values

List of values

n	a(n)
1	4
2	2
3	3
4	2
5	2
6	2
7	2
8	1
9	2
10	2
11	1
12	1
13	1
14	1
15	2
16	2
17	2
18	1
19	2
20	1
21	1
22	1
23	1
24	1
25	2
26	2
27	1
28	2
29	2
30	2
31	1
32	1
33	2
34	1
35	2
36	1
37	2
38	2
39	2
40	2
41	1
42	1
43	1
44	2
45	1
46	1
47	2
48	2
49	1
50	2
51	2
52	1
53	1
54	1
55	1
56	1
57	2
58	1
59	1
60	1
61	2
62	2
63	2
64	1
65	2
66	2
67	2
68	1
69	1
70	1
71	2
72	1
73	1
74	1
75	1
76	2
77	1
78	2
79	1
80	1
81	1
82	1
83	2
84	1
85	2
86	1
87	2

n	a(n)
1	4
2	2
3	3
4	2
5	2
6	2
7	2
8	1
9	2
10	2
11	1
12	1
13	1
14	1
15	2
16	2
17	2
18	1
19	2
20	1
21	1
22	1
23	1
24	1
25	2
26	2
27	1
28	2
29	2
30	2
31	1
32	1
33	2
34	1
35	2
36	1
37	2
38	2
39	2
40	2
41	1
42	1
43	1
44	2
45	1
46	1
47	2
48	2
49	1
50	2
51	2
52	1
53	1
54	1
55	1
56	1
57	2
58	1
59	1
60	1
61	2
62	2
63	2
64	1
65	2
66	2
67	2
68	1
69	1
70	1
71	2
72	1
73	1
74	1
75	1
76	2
77	1
78	2
79	1
80	1
81	1
82	1
83	2
84	1
85	2
86	1
87	2

n	a(n)
1	4
2	2
3	3
4	2
5	2
6	2
7	2
8	1
9	2
10	2
11	1
12	1
13	1
14	1
15	2
16	2
17	2
18	1
19	2
20	1
21	1
22	1
23	1
24	1
25	2
26	2
27	1
28	2
29	2
30	2
31	1
32	1
33	2
34	1
35	2
36	1
37	2
38	2
39	2
40	2
41	1
42	1
43	1
44	2
45	1
46	1
47	2
48	2
49	1
50	2
51	2
52	1
53	1
54	1
55	1
56	1
57	2
58	1
59	1
60	1
61	2
62	2
63	2
64	1
65	2
66	2
67	2
68	1
69	1
70	1
71	2
72	1
73	1
74	1
75	1
76	2
77	1
78	2
79	1
80	1
81	1
82	1
83	2
84	1
85	2
86	1
87	2