A163405 - cp's OEIS frontend

A163405 a(n) = (n-th nonprime) + (number of bits in binary expansion of n-th nonprime).

n	a(n)
1	1
2	2
3	7
4	9
5	12
6	13
7	14
8	16
9	18
10	19
11	21
12	23
13	25
14	26
15	27
16	29
17	30
18	31
19	32
20	33
21	35
22	38
23	39
24	40
25	41
26	42
27	44
28	45
29	46
30	48
31	50
32	51
33	52
34	54
35	55
36	56
37	57
38	58
39	60
40	61
41	62
42	63
43	64
44	66
45	68
46	69
47	71
48	72
49	73
50	75
51	76
52	77
53	79
54	81
55	82
56	83
57	84
58	85
59	87
60	88
61	89
62	91
63	92
64	93
65	94
66	95
67	97
68	98
69	99
70	100
71	101

[1, 2, 7, 9, 12, 13, 14, 16, 18, 19, 21, 23, 25, 26, 27, 29, 30, 31, 32, 33, 35, 38, 39, 40, 41, 42, 44, 45, 46, 48, 50, 51, 52, 54, 55, 56, 57, 58, 60, 61, 62, 63, 64, 66, 68, 69, 71, 72, 73, 75, 76, 77, 79, 81, 82, 83, 84, 85, 87, 88, 89, 91, 92, 93, 94, 95, 97, 98, 99, 100, 101]

cp's OEIS Frontend

A163405 a(n) = (n-th nonprime) + (number of bits in binary expansion of n-th nonprime).

Table of values

List of values

n	a(n)
1	1
2	2
3	7
4	9
5	12
6	13
7	14
8	16
9	18
10	19
11	21
12	23
13	25
14	26
15	27
16	29
17	30
18	31
19	32
20	33
21	35
22	38
23	39
24	40
25	41
26	42
27	44
28	45
29	46
30	48
31	50
32	51
33	52
34	54
35	55
36	56
37	57
38	58
39	60
40	61
41	62
42	63
43	64
44	66
45	68
46	69
47	71
48	72
49	73
50	75
51	76
52	77
53	79
54	81
55	82
56	83
57	84
58	85
59	87
60	88
61	89
62	91
63	92
64	93
65	94
66	95
67	97
68	98
69	99
70	100
71	101

n	a(n)
1	1
2	2
3	7
4	9
5	12
6	13
7	14
8	16
9	18
10	19
11	21
12	23
13	25
14	26
15	27
16	29
17	30
18	31
19	32
20	33
21	35
22	38
23	39
24	40
25	41
26	42
27	44
28	45
29	46
30	48
31	50
32	51
33	52
34	54
35	55
36	56
37	57
38	58
39	60
40	61
41	62
42	63
43	64
44	66
45	68
46	69
47	71
48	72
49	73
50	75
51	76
52	77
53	79
54	81
55	82
56	83
57	84
58	85
59	87
60	88
61	89
62	91
63	92
64	93
65	94
66	95
67	97
68	98
69	99
70	100
71	101

n	a(n)
1	1
2	2
3	7
4	9
5	12
6	13
7	14
8	16
9	18
10	19
11	21
12	23
13	25
14	26
15	27
16	29
17	30
18	31
19	32
20	33
21	35
22	38
23	39
24	40
25	41
26	42
27	44
28	45
29	46
30	48
31	50
32	51
33	52
34	54
35	55
36	56
37	57
38	58
39	60
40	61
41	62
42	63
43	64
44	66
45	68
46	69
47	71
48	72
49	73
50	75
51	76
52	77
53	79
54	81
55	82
56	83
57	84
58	85
59	87
60	88
61	89
62	91
63	92
64	93
65	94
66	95
67	97
68	98
69	99
70	100
71	101