A305429 - cp's OEIS frontend

A305429 Largest k < n whose binary expansion encodes an irreducible (0,1)-polynomial over Q, with a(1) = a(2) = 1.

n	a(n)
1	1
2	1
3	2
4	3
5	3
6	5
7	5
8	7
9	7
10	7
11	7
12	11
13	11
14	13
15	13
16	13
17	13
18	17
19	17
20	19
21	19
22	19
23	19
24	23
25	23
26	25
27	25
28	25
29	25
30	29
31	29
32	31
33	31
34	31
35	31
36	31
37	31
38	37
39	37
40	37
41	37
42	41
43	41
44	43
45	43
46	43
47	43
48	47
49	47
50	47
51	47
52	47
53	47
54	53
55	53
56	55
57	55
58	55
59	55
60	59
61	59
62	61
63	61
64	61
65	61
66	61
67	61
68	67
69	67
70	69
71	69
72	71
73	71
74	73
75	73
76	73
77	73
78	77
79	77
80	79
81	79
82	81
83	81
84	83
85	83
86	83
87	83
88	87
89	87

[1, 1, 2, 3, 3, 5, 5, 7, 7, 7, 7, 11, 11, 13, 13, 13, 13, 17, 17, 19, 19, 19, 19, 23, 23, 25, 25, 25, 25, 29, 29, 31, 31, 31, 31, 31, 31, 37, 37, 37, 37, 41, 41, 43, 43, 43, 43, 47, 47, 47, 47, 47, 47, 53, 53, 55, 55, 55, 55, 59, 59, 61, 61, 61, 61, 61, 61, 67, 67, 69, 69, 71, 71, 73, 73, 73, 73, 77, 77, 79, 79, 81, 81, 83, 83, 83, 83, 87, 87]

cp's OEIS Frontend

A305429 Largest k < n whose binary expansion encodes an irreducible (0,1)-polynomial over Q, with a(1) = a(2) = 1.

Table of values

List of values

n	a(n)
1	1
2	1
3	2
4	3
5	3
6	5
7	5
8	7
9	7
10	7
11	7
12	11
13	11
14	13
15	13
16	13
17	13
18	17
19	17
20	19
21	19
22	19
23	19
24	23
25	23
26	25
27	25
28	25
29	25
30	29
31	29
32	31
33	31
34	31
35	31
36	31
37	31
38	37
39	37
40	37
41	37
42	41
43	41
44	43
45	43
46	43
47	43
48	47
49	47
50	47
51	47
52	47
53	47
54	53
55	53
56	55
57	55
58	55
59	55
60	59
61	59
62	61
63	61
64	61
65	61
66	61
67	61
68	67
69	67
70	69
71	69
72	71
73	71
74	73
75	73
76	73
77	73
78	77
79	77
80	79
81	79
82	81
83	81
84	83
85	83
86	83
87	83
88	87
89	87

n	a(n)
1	1
2	1
3	2
4	3
5	3
6	5
7	5
8	7
9	7
10	7
11	7
12	11
13	11
14	13
15	13
16	13
17	13
18	17
19	17
20	19
21	19
22	19
23	19
24	23
25	23
26	25
27	25
28	25
29	25
30	29
31	29
32	31
33	31
34	31
35	31
36	31
37	31
38	37
39	37
40	37
41	37
42	41
43	41
44	43
45	43
46	43
47	43
48	47
49	47
50	47
51	47
52	47
53	47
54	53
55	53
56	55
57	55
58	55
59	55
60	59
61	59
62	61
63	61
64	61
65	61
66	61
67	61
68	67
69	67
70	69
71	69
72	71
73	71
74	73
75	73
76	73
77	73
78	77
79	77
80	79
81	79
82	81
83	81
84	83
85	83
86	83
87	83
88	87
89	87

n	a(n)
1	1
2	1
3	2
4	3
5	3
6	5
7	5
8	7
9	7
10	7
11	7
12	11
13	11
14	13
15	13
16	13
17	13
18	17
19	17
20	19
21	19
22	19
23	19
24	23
25	23
26	25
27	25
28	25
29	25
30	29
31	29
32	31
33	31
34	31
35	31
36	31
37	31
38	37
39	37
40	37
41	37
42	41
43	41
44	43
45	43
46	43
47	43
48	47
49	47
50	47
51	47
52	47
53	47
54	53
55	53
56	55
57	55
58	55
59	55
60	59
61	59
62	61
63	61
64	61
65	61
66	61
67	61
68	67
69	67
70	69
71	69
72	71
73	71
74	73
75	73
76	73
77	73
78	77
79	77
80	79
81	79
82	81
83	81
84	83
85	83
86	83
87	83
88	87
89	87