A260426 - cp's OEIS frontend

A260426 a(1) = 1, a(A206074(n)) = A014580(a(n)), a(A205783(1+n)) = A091242(a(n)), where A014580 [respectively A091242] give binary codes for irreducible [resp. reducible] polynomials over GF(2), while A206074 and A205783 give similar codes for polynomials with coefficients 0 or 1 that are irreducible [resp. reducible] over Q.

n	a(n)
1	1
2	2
3	3
4	4
5	7
6	5
7	11
8	6
9	8
10	12
11	25
12	9
13	13
14	17
15	10
16	14
17	47
18	18
19	19
20	34
21	15
22	20
23	31
24	24
25	55
26	16
27	21
28	62
29	137
30	26
31	37
32	27
33	45
34	22
35	28
36	42
37	59
38	33
39	71
40	23
41	87
42	29
43	41
44	79
45	166
46	35
47	61
48	49
49	36
50	58
51	30
52	38
53	319
54	54
55	91
56	76
57	44
58	89
59	97
60	32
61	203
62	108
63	39
64	53
65	99
66	200
67	67
68	46
69	103
70	78
71	185
72	64
73	131
74	48
75	75
76	40
77	379
78	50
79	73
80	373
81	109
82	70
83	433
84	113
85	95
86	57
87	1123
88	111
89	143
90	121

[1, 2, 3, 4, 7, 5, 11, 6, 8, 12, 25, 9, 13, 17, 10, 14, 47, 18, 19, 34, 15, 20, 31, 24, 55, 16, 21, 62, 137, 26, 37, 27, 45, 22, 28, 42, 59, 33, 71, 23, 87, 29, 41, 79, 166, 35, 61, 49, 36, 58, 30, 38, 319, 54, 91, 76, 44, 89, 97, 32, 203, 108, 39, 53, 99, 200, 67, 46, 103, 78, 185, 64, 131, 48, 75, 40, 379, 50, 73, 373, 109, 70, 433, 113, 95, 57, 1123, 111, 143, 121]

cp's OEIS Frontend

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