A163975 - cp's OEIS frontend

A163975 n-th nonprime - (-1)^(n-th nonprime).

n	a(n)
1	-1
2	2
3	3
4	5
5	7
6	10
7	9
8	11
9	13
10	16
11	15
12	17
13	19
14	22
15	21
16	23
17	26
18	25
19	28
20	27
21	29
22	31
23	34
24	33
25	36
26	35
27	37
28	40
29	39
30	41
31	43
32	46
33	45
34	47
35	50
36	49
37	52
38	51
39	53
40	56
41	55
42	58
43	57
44	59
45	61
46	64
47	63
48	66
49	65
50	67
51	70
52	69
53	71
54	73
55	76
56	75
57	78
58	77
59	79
60	82
61	81
62	83
63	86
64	85
65	88
66	87
67	89
68	92
69	91
70	94
71	93

[-1, 2, 3, 5, 7, 10, 9, 11, 13, 16, 15, 17, 19, 22, 21, 23, 26, 25, 28, 27, 29, 31, 34, 33, 36, 35, 37, 40, 39, 41, 43, 46, 45, 47, 50, 49, 52, 51, 53, 56, 55, 58, 57, 59, 61, 64, 63, 66, 65, 67, 70, 69, 71, 73, 76, 75, 78, 77, 79, 82, 81, 83, 86, 85, 88, 87, 89, 92, 91, 94, 93]

cp's OEIS Frontend

A163975 n-th nonprime - (-1)^(n-th nonprime).

Table of values

List of values

n	a(n)
1	-1
2	2
3	3
4	5
5	7
6	10
7	9
8	11
9	13
10	16
11	15
12	17
13	19
14	22
15	21
16	23
17	26
18	25
19	28
20	27
21	29
22	31
23	34
24	33
25	36
26	35
27	37
28	40
29	39
30	41
31	43
32	46
33	45
34	47
35	50
36	49
37	52
38	51
39	53
40	56
41	55
42	58
43	57
44	59
45	61
46	64
47	63
48	66
49	65
50	67
51	70
52	69
53	71
54	73
55	76
56	75
57	78
58	77
59	79
60	82
61	81
62	83
63	86
64	85
65	88
66	87
67	89
68	92
69	91
70	94
71	93

n	a(n)
1	-1
2	2
3	3
4	5
5	7
6	10
7	9
8	11
9	13
10	16
11	15
12	17
13	19
14	22
15	21
16	23
17	26
18	25
19	28
20	27
21	29
22	31
23	34
24	33
25	36
26	35
27	37
28	40
29	39
30	41
31	43
32	46
33	45
34	47
35	50
36	49
37	52
38	51
39	53
40	56
41	55
42	58
43	57
44	59
45	61
46	64
47	63
48	66
49	65
50	67
51	70
52	69
53	71
54	73
55	76
56	75
57	78
58	77
59	79
60	82
61	81
62	83
63	86
64	85
65	88
66	87
67	89
68	92
69	91
70	94
71	93

n	a(n)
1	-1
2	2
3	3
4	5
5	7
6	10
7	9
8	11
9	13
10	16
11	15
12	17
13	19
14	22
15	21
16	23
17	26
18	25
19	28
20	27
21	29
22	31
23	34
24	33
25	36
26	35
27	37
28	40
29	39
30	41
31	43
32	46
33	45
34	47
35	50
36	49
37	52
38	51
39	53
40	56
41	55
42	58
43	57
44	59
45	61
46	64
47	63
48	66
49	65
50	67
51	70
52	69
53	71
54	73
55	76
56	75
57	78
58	77
59	79
60	82
61	81
62	83
63	86
64	85
65	88
66	87
67	89
68	92
69	91
70	94
71	93