A304880 - cp's OEIS frontend

A304880 a(n) is the numerator of the smallest nonnegative fraction r such that round(10^d*r) = n, where d is the number of digits of n and Gaussian rounding (round half to even) is applied.

n	a(n)
0	0
1	1
2	1
3	2
4	3
5	1
6	5
7	2
8	3
9	6
10	2
11	2
12	3
13	12
14	5
15	9
16	9
17	1
18	7
19	5
20	8
21	8
22	20
23	16
24	4
25	13
26	25
27	22
28	11
29	2
30	18
31	18
32	23
33	27
34	33
35	29
36	27
37	23
38	3
39	37
40	32
41	32
42	22
43	37
44	37
45	41
46	41
47	20
48	19
49	33
50	1
51	50
52	17
53	52
54	38
55	6
56	5
57	13
58	23
59	55
60	25
61	23
62	8
63	62
64	47
65	20
66	19
67	2
68	27
69	37
70	57
71	55

[0, 1, 1, 2, 3, 1, 5, 2, 3, 6, 2, 2, 3, 12, 5, 9, 9, 1, 7, 5, 8, 8, 20, 16, 4, 13, 25, 22, 11, 2, 18, 18, 23, 27, 33, 29, 27, 23, 3, 37, 32, 32, 22, 37, 37, 41, 41, 20, 19, 33, 1, 50, 17, 52, 38, 6, 5, 13, 23, 55, 25, 23, 8, 62, 47, 20, 19, 2, 27, 37, 57, 55]

cp's OEIS Frontend

A304880 a(n) is the numerator of the smallest nonnegative fraction r such that round(10^d*r) = n, where d is the number of digits of n and Gaussian rounding (round half to even) is applied.

Table of values

List of values

n	a(n)
0	0
1	1
2	1
3	2
4	3
5	1
6	5
7	2
8	3
9	6
10	2
11	2
12	3
13	12
14	5
15	9
16	9
17	1
18	7
19	5
20	8
21	8
22	20
23	16
24	4
25	13
26	25
27	22
28	11
29	2
30	18
31	18
32	23
33	27
34	33
35	29
36	27
37	23
38	3
39	37
40	32
41	32
42	22
43	37
44	37
45	41
46	41
47	20
48	19
49	33
50	1
51	50
52	17
53	52
54	38
55	6
56	5
57	13
58	23
59	55
60	25
61	23
62	8
63	62
64	47
65	20
66	19
67	2
68	27
69	37
70	57
71	55

n	a(n)
0	0
1	1
2	1
3	2
4	3
5	1
6	5
7	2
8	3
9	6
10	2
11	2
12	3
13	12
14	5
15	9
16	9
17	1
18	7
19	5
20	8
21	8
22	20
23	16
24	4
25	13
26	25
27	22
28	11
29	2
30	18
31	18
32	23
33	27
34	33
35	29
36	27
37	23
38	3
39	37
40	32
41	32
42	22
43	37
44	37
45	41
46	41
47	20
48	19
49	33
50	1
51	50
52	17
53	52
54	38
55	6
56	5
57	13
58	23
59	55
60	25
61	23
62	8
63	62
64	47
65	20
66	19
67	2
68	27
69	37
70	57
71	55

n	a(n)
0	0
1	1
2	1
3	2
4	3
5	1
6	5
7	2
8	3
9	6
10	2
11	2
12	3
13	12
14	5
15	9
16	9
17	1
18	7
19	5
20	8
21	8
22	20
23	16
24	4
25	13
26	25
27	22
28	11
29	2
30	18
31	18
32	23
33	27
34	33
35	29
36	27
37	23
38	3
39	37
40	32
41	32
42	22
43	37
44	37
45	41
46	41
47	20
48	19
49	33
50	1
51	50
52	17
53	52
54	38
55	6
56	5
57	13
58	23
59	55
60	25
61	23
62	8
63	62
64	47
65	20
66	19
67	2
68	27
69	37
70	57
71	55