A270097 - cp's OEIS frontend

A270097 Discriminator sequence for the powers of 2: smallest positive integer d such that 2^0, 2^1, ..., 2^{n-1} are all incongruent modulo d.

n	a(n)
0	1
1	2
2	4
3	5
4	9
5	9
6	11
7	11
8	11
9	11
10	13
11	13
12	19
13	19
14	19
15	19
16	19
17	19
18	25
19	25
20	29
21	29
22	29
23	29
24	29
25	29
26	29
27	29
28	37
29	37
30	37
31	37
32	37
33	37
34	37
35	37
36	53
37	53
38	53
39	53
40	53
41	53
42	53
43	53
44	53
45	53
46	53
47	53
48	53
49	53
50	53
51	53
52	59
53	59
54	59
55	59
56	59
57	59
58	61
59	61
60	67
61	67
62	67
63	67
64	67
65	67
66	83
67	83
68	83
69	83
70	83
71	83
72	83
73	83
74	83
75	83
76	83
77	83
78	83
79	83
80	83
81	83
82	101

[1, 2, 4, 5, 9, 9, 11, 11, 11, 11, 13, 13, 19, 19, 19, 19, 19, 19, 25, 25, 29, 29, 29, 29, 29, 29, 29, 29, 37, 37, 37, 37, 37, 37, 37, 37, 53, 53, 53, 53, 53, 53, 53, 53, 53, 53, 53, 53, 53, 53, 53, 53, 59, 59, 59, 59, 59, 59, 61, 61, 67, 67, 67, 67, 67, 67, 83, 83, 83, 83, 83, 83, 83, 83, 83, 83, 83, 83, 83, 83, 83, 83, 101]

cp's OEIS Frontend

A270097 Discriminator sequence for the powers of 2: smallest positive integer d such that 2^0, 2^1, ..., 2^{n-1} are all incongruent modulo d.

Table of values

List of values

n	a(n)
0	1
1	2
2	4
3	5
4	9
5	9
6	11
7	11
8	11
9	11
10	13
11	13
12	19
13	19
14	19
15	19
16	19
17	19
18	25
19	25
20	29
21	29
22	29
23	29
24	29
25	29
26	29
27	29
28	37
29	37
30	37
31	37
32	37
33	37
34	37
35	37
36	53
37	53
38	53
39	53
40	53
41	53
42	53
43	53
44	53
45	53
46	53
47	53
48	53
49	53
50	53
51	53
52	59
53	59
54	59
55	59
56	59
57	59
58	61
59	61
60	67
61	67
62	67
63	67
64	67
65	67
66	83
67	83
68	83
69	83
70	83
71	83
72	83
73	83
74	83
75	83
76	83
77	83
78	83
79	83
80	83
81	83
82	101

n	a(n)
0	1
1	2
2	4
3	5
4	9
5	9
6	11
7	11
8	11
9	11
10	13
11	13
12	19
13	19
14	19
15	19
16	19
17	19
18	25
19	25
20	29
21	29
22	29
23	29
24	29
25	29
26	29
27	29
28	37
29	37
30	37
31	37
32	37
33	37
34	37
35	37
36	53
37	53
38	53
39	53
40	53
41	53
42	53
43	53
44	53
45	53
46	53
47	53
48	53
49	53
50	53
51	53
52	59
53	59
54	59
55	59
56	59
57	59
58	61
59	61
60	67
61	67
62	67
63	67
64	67
65	67
66	83
67	83
68	83
69	83
70	83
71	83
72	83
73	83
74	83
75	83
76	83
77	83
78	83
79	83
80	83
81	83
82	101

n	a(n)
0	1
1	2
2	4
3	5
4	9
5	9
6	11
7	11
8	11
9	11
10	13
11	13
12	19
13	19
14	19
15	19
16	19
17	19
18	25
19	25
20	29
21	29
22	29
23	29
24	29
25	29
26	29
27	29
28	37
29	37
30	37
31	37
32	37
33	37
34	37
35	37
36	53
37	53
38	53
39	53
40	53
41	53
42	53
43	53
44	53
45	53
46	53
47	53
48	53
49	53
50	53
51	53
52	59
53	59
54	59
55	59
56	59
57	59
58	61
59	61
60	67
61	67
62	67
63	67
64	67
65	67
66	83
67	83
68	83
69	83
70	83
71	83
72	83
73	83
74	83
75	83
76	83
77	83
78	83
79	83
80	83
81	83
82	101