A073571 - cp's OEIS frontend

A073571 Irreducible trinomials: numbers n such that x^n + x^k + 1 is an irreducible polynomial (mod 2) for some k with 0 < k < n.

n	a(n)
1	2
2	3
3	4
4	5
5	6
6	7
7	9
8	10
9	11
10	12
11	14
12	15
13	17
14	18
15	20
16	21
17	22
18	23
19	25
20	28
21	29
22	30
23	31
24	33
25	34
26	35
27	36
28	39
29	41
30	42
31	44
32	46
33	47
34	49
35	52
36	54
37	55
38	57
39	58
40	60
41	62
42	63
43	65
44	66
45	68
46	71
47	73
48	74
49	76
50	79
51	81
52	84
53	86
54	87
55	89
56	90
57	92
58	93
59	94
60	95
61	97
62	98
63	100
64	102
65	103
66	105
67	106
68	108
69	110
70	111
71	113

[2, 3, 4, 5, 6, 7, 9, 10, 11, 12, 14, 15, 17, 18, 20, 21, 22, 23, 25, 28, 29, 30, 31, 33, 34, 35, 36, 39, 41, 42, 44, 46, 47, 49, 52, 54, 55, 57, 58, 60, 62, 63, 65, 66, 68, 71, 73, 74, 76, 79, 81, 84, 86, 87, 89, 90, 92, 93, 94, 95, 97, 98, 100, 102, 103, 105, 106, 108, 110, 111, 113]

cp's OEIS Frontend

A073571 Irreducible trinomials: numbers n such that x^n + x^k + 1 is an irreducible polynomial (mod 2) for some k with 0 < k < n.

Table of values

List of values

n	a(n)
1	2
2	3
3	4
4	5
5	6
6	7
7	9
8	10
9	11
10	12
11	14
12	15
13	17
14	18
15	20
16	21
17	22
18	23
19	25
20	28
21	29
22	30
23	31
24	33
25	34
26	35
27	36
28	39
29	41
30	42
31	44
32	46
33	47
34	49
35	52
36	54
37	55
38	57
39	58
40	60
41	62
42	63
43	65
44	66
45	68
46	71
47	73
48	74
49	76
50	79
51	81
52	84
53	86
54	87
55	89
56	90
57	92
58	93
59	94
60	95
61	97
62	98
63	100
64	102
65	103
66	105
67	106
68	108
69	110
70	111
71	113

n	a(n)
1	2
2	3
3	4
4	5
5	6
6	7
7	9
8	10
9	11
10	12
11	14
12	15
13	17
14	18
15	20
16	21
17	22
18	23
19	25
20	28
21	29
22	30
23	31
24	33
25	34
26	35
27	36
28	39
29	41
30	42
31	44
32	46
33	47
34	49
35	52
36	54
37	55
38	57
39	58
40	60
41	62
42	63
43	65
44	66
45	68
46	71
47	73
48	74
49	76
50	79
51	81
52	84
53	86
54	87
55	89
56	90
57	92
58	93
59	94
60	95
61	97
62	98
63	100
64	102
65	103
66	105
67	106
68	108
69	110
70	111
71	113

n	a(n)
1	2
2	3
3	4
4	5
5	6
6	7
7	9
8	10
9	11
10	12
11	14
12	15
13	17
14	18
15	20
16	21
17	22
18	23
19	25
20	28
21	29
22	30
23	31
24	33
25	34
26	35
27	36
28	39
29	41
30	42
31	44
32	46
33	47
34	49
35	52
36	54
37	55
38	57
39	58
40	60
41	62
42	63
43	65
44	66
45	68
46	71
47	73
48	74
49	76
50	79
51	81
52	84
53	86
54	87
55	89
56	90
57	92
58	93
59	94
60	95
61	97
62	98
63	100
64	102
65	103
66	105
67	106
68	108
69	110
70	111
71	113