A047845 - cp's OEIS frontend

A047845 a(n) = (m-1)/2, where m is the n-th odd nonprime (A014076(n)).

n	a(n)
1	0
2	4
3	7
4	10
5	12
6	13
7	16
8	17
9	19
10	22
11	24
12	25
13	27
14	28
15	31
16	32
17	34
18	37
19	38
20	40
21	42
22	43
23	45
24	46
25	47
26	49
27	52
28	55
29	57
30	58
31	59
32	60
33	61
34	62
35	64
36	66
37	67
38	70
39	71
40	72
41	73
42	76
43	77
44	79
45	80
46	82
47	84
48	85
49	87
50	88
51	91
52	92
53	93
54	94
55	97
56	100
57	101
58	102
59	103
60	104
61	106
62	107
63	108
64	109
65	110
66	112
67	115

[0, 4, 7, 10, 12, 13, 16, 17, 19, 22, 24, 25, 27, 28, 31, 32, 34, 37, 38, 40, 42, 43, 45, 46, 47, 49, 52, 55, 57, 58, 59, 60, 61, 62, 64, 66, 67, 70, 71, 72, 73, 76, 77, 79, 80, 82, 84, 85, 87, 88, 91, 92, 93, 94, 97, 100, 101, 102, 103, 104, 106, 107, 108, 109, 110, 112, 115]

cp's OEIS Frontend

A047845 a(n) = (m-1)/2, where m is the n-th odd nonprime (A014076(n)).

Table of values

List of values

n	a(n)
1	0
2	4
3	7
4	10
5	12
6	13
7	16
8	17
9	19
10	22
11	24
12	25
13	27
14	28
15	31
16	32
17	34
18	37
19	38
20	40
21	42
22	43
23	45
24	46
25	47
26	49
27	52
28	55
29	57
30	58
31	59
32	60
33	61
34	62
35	64
36	66
37	67
38	70
39	71
40	72
41	73
42	76
43	77
44	79
45	80
46	82
47	84
48	85
49	87
50	88
51	91
52	92
53	93
54	94
55	97
56	100
57	101
58	102
59	103
60	104
61	106
62	107
63	108
64	109
65	110
66	112
67	115

n	a(n)
1	0
2	4
3	7
4	10
5	12
6	13
7	16
8	17
9	19
10	22
11	24
12	25
13	27
14	28
15	31
16	32
17	34
18	37
19	38
20	40
21	42
22	43
23	45
24	46
25	47
26	49
27	52
28	55
29	57
30	58
31	59
32	60
33	61
34	62
35	64
36	66
37	67
38	70
39	71
40	72
41	73
42	76
43	77
44	79
45	80
46	82
47	84
48	85
49	87
50	88
51	91
52	92
53	93
54	94
55	97
56	100
57	101
58	102
59	103
60	104
61	106
62	107
63	108
64	109
65	110
66	112
67	115

n	a(n)
1	0
2	4
3	7
4	10
5	12
6	13
7	16
8	17
9	19
10	22
11	24
12	25
13	27
14	28
15	31
16	32
17	34
18	37
19	38
20	40
21	42
22	43
23	45
24	46
25	47
26	49
27	52
28	55
29	57
30	58
31	59
32	60
33	61
34	62
35	64
36	66
37	67
38	70
39	71
40	72
41	73
42	76
43	77
44	79
45	80
46	82
47	84
48	85
49	87
50	88
51	91
52	92
53	93
54	94
55	97
56	100
57	101
58	102
59	103
60	104
61	106
62	107
63	108
64	109
65	110
66	112
67	115