A174620 - cp's OEIS frontend

A174620 a(n) = 2^A141468(n) mod prime(n), where A141468(n) is the n-th nonnegative nonprime.

n	a(n)
1	1
2	2
3	1
4	1
5	3
6	5
7	4
8	11
9	8
10	27
11	2
12	36
13	1
14	42
15	24
16	13
17	11
18	19
19	45
20	5
21	8
22	50
23	71
24	2
25	86
26	78
27	15
28	74
29	16
30	112
31	4
32	68
33	14
34	106
35	66
36	32
37	79
38	26
39	25
40	18
41	76
42	6
43	78
44	150
45	163
46	63
47	69
48	98
49	189
50	17
51	184
52	40
53	1
54	125
55	249
56	187
57	229
58	69
59	169
60	81
61	264
62	172
63	18
64	209
65	114
66	277
67	1
68	128
69	46
70	21

[1, 2, 1, 1, 3, 5, 4, 11, 8, 27, 2, 36, 1, 42, 24, 13, 11, 19, 45, 5, 8, 50, 71, 2, 86, 78, 15, 74, 16, 112, 4, 68, 14, 106, 66, 32, 79, 26, 25, 18, 76, 6, 78, 150, 163, 63, 69, 98, 189, 17, 184, 40, 1, 125, 249, 187, 229, 69, 169, 81, 264, 172, 18, 209, 114, 277, 1, 128, 46, 21]

cp's OEIS Frontend

A174620 a(n) = 2^A141468(n) mod prime(n), where A141468(n) is the n-th nonnegative nonprime.

Table of values

List of values

n	a(n)
1	1
2	2
3	1
4	1
5	3
6	5
7	4
8	11
9	8
10	27
11	2
12	36
13	1
14	42
15	24
16	13
17	11
18	19
19	45
20	5
21	8
22	50
23	71
24	2
25	86
26	78
27	15
28	74
29	16
30	112
31	4
32	68
33	14
34	106
35	66
36	32
37	79
38	26
39	25
40	18
41	76
42	6
43	78
44	150
45	163
46	63
47	69
48	98
49	189
50	17
51	184
52	40
53	1
54	125
55	249
56	187
57	229
58	69
59	169
60	81
61	264
62	172
63	18
64	209
65	114
66	277
67	1
68	128
69	46
70	21

n	a(n)
1	1
2	2
3	1
4	1
5	3
6	5
7	4
8	11
9	8
10	27
11	2
12	36
13	1
14	42
15	24
16	13
17	11
18	19
19	45
20	5
21	8
22	50
23	71
24	2
25	86
26	78
27	15
28	74
29	16
30	112
31	4
32	68
33	14
34	106
35	66
36	32
37	79
38	26
39	25
40	18
41	76
42	6
43	78
44	150
45	163
46	63
47	69
48	98
49	189
50	17
51	184
52	40
53	1
54	125
55	249
56	187
57	229
58	69
59	169
60	81
61	264
62	172
63	18
64	209
65	114
66	277
67	1
68	128
69	46
70	21

n	a(n)
1	1
2	2
3	1
4	1
5	3
6	5
7	4
8	11
9	8
10	27
11	2
12	36
13	1
14	42
15	24
16	13
17	11
18	19
19	45
20	5
21	8
22	50
23	71
24	2
25	86
26	78
27	15
28	74
29	16
30	112
31	4
32	68
33	14
34	106
35	66
36	32
37	79
38	26
39	25
40	18
41	76
42	6
43	78
44	150
45	163
46	63
47	69
48	98
49	189
50	17
51	184
52	40
53	1
54	125
55	249
56	187
57	229
58	69
59	169
60	81
61	264
62	172
63	18
64	209
65	114
66	277
67	1
68	128
69	46
70	21