A226721 - cp's OEIS frontend

A226721 Position of 2^n in the joint ranking of all the numbers 2^j for j>=0 and 5^k for k>=1; complement of A123384.

n	a(n)
1	2
2	3
3	5
4	6
5	8
6	9
7	11
8	12
9	13
10	15
11	16
12	18
13	19
14	21
15	22
16	23
17	25
18	26
19	28
20	29
21	31
22	32
23	33
24	35
25	36
26	38
27	39
28	41
29	42
30	43
31	45
32	46
33	48
34	49
35	51
36	52
37	53
38	55
39	56
40	58
41	59
42	61
43	62
44	63
45	65
46	66
47	68
48	69
49	71
50	72
51	73
52	75
53	76
54	78
55	79
56	81
57	82
58	83
59	85
60	86
61	88
62	89
63	91
64	92
65	93
66	95

[2, 3, 5, 6, 8, 9, 11, 12, 13, 15, 16, 18, 19, 21, 22, 23, 25, 26, 28, 29, 31, 32, 33, 35, 36, 38, 39, 41, 42, 43, 45, 46, 48, 49, 51, 52, 53, 55, 56, 58, 59, 61, 62, 63, 65, 66, 68, 69, 71, 72, 73, 75, 76, 78, 79, 81, 82, 83, 85, 86, 88, 89, 91, 92, 93, 95]

cp's OEIS Frontend

A226721 Position of 2^n in the joint ranking of all the numbers 2^j for j>=0 and 5^k for k>=1; complement of A123384.

Table of values

List of values

n	a(n)
1	2
2	3
3	5
4	6
5	8
6	9
7	11
8	12
9	13
10	15
11	16
12	18
13	19
14	21
15	22
16	23
17	25
18	26
19	28
20	29
21	31
22	32
23	33
24	35
25	36
26	38
27	39
28	41
29	42
30	43
31	45
32	46
33	48
34	49
35	51
36	52
37	53
38	55
39	56
40	58
41	59
42	61
43	62
44	63
45	65
46	66
47	68
48	69
49	71
50	72
51	73
52	75
53	76
54	78
55	79
56	81
57	82
58	83
59	85
60	86
61	88
62	89
63	91
64	92
65	93
66	95

n	a(n)
1	2
2	3
3	5
4	6
5	8
6	9
7	11
8	12
9	13
10	15
11	16
12	18
13	19
14	21
15	22
16	23
17	25
18	26
19	28
20	29
21	31
22	32
23	33
24	35
25	36
26	38
27	39
28	41
29	42
30	43
31	45
32	46
33	48
34	49
35	51
36	52
37	53
38	55
39	56
40	58
41	59
42	61
43	62
44	63
45	65
46	66
47	68
48	69
49	71
50	72
51	73
52	75
53	76
54	78
55	79
56	81
57	82
58	83
59	85
60	86
61	88
62	89
63	91
64	92
65	93
66	95

n	a(n)
1	2
2	3
3	5
4	6
5	8
6	9
7	11
8	12
9	13
10	15
11	16
12	18
13	19
14	21
15	22
16	23
17	25
18	26
19	28
20	29
21	31
22	32
23	33
24	35
25	36
26	38
27	39
28	41
29	42
30	43
31	45
32	46
33	48
34	49
35	51
36	52
37	53
38	55
39	56
40	58
41	59
42	61
43	62
44	63
45	65
46	66
47	68
48	69
49	71
50	72
51	73
52	75
53	76
54	78
55	79
56	81
57	82
58	83
59	85
60	86
61	88
62	89
63	91
64	92
65	93
66	95