A387014 - cp's OEIS frontend

A387014 Middle element of the list {1, 2, 3, ..., 2n-1} when elements are sorted lexicographically by their Roman numeral representations.

n	a(n)
1	1
2	2
3	3
4	4
5	9
6	5
7	6
8	7
9	8
10	10
11	11
12	12
13	13
14	14
15	19
16	15
17	16
18	17
19	18
20	20
21	18
22	17
23	16
24	15
25	48
26	47
27	46
28	45
29	49
30	44
31	43
32	42
33	41
34	40
35	19
36	14
37	13
38	12
39	11
40	10
41	8
42	7
43	6
44	5
45	88
46	5
47	6
48	7
49	8
50	10
51	8
52	7
53	6
54	5
55	88
56	87
57	86
58	85
59	89
60	84
61	83
62	82
63	81
64	80
65	78
66	77
67	76
68	75
69	79
70	74
71	73
72	72
73	71
74	70

[1, 2, 3, 4, 9, 5, 6, 7, 8, 10, 11, 12, 13, 14, 19, 15, 16, 17, 18, 20, 18, 17, 16, 15, 48, 47, 46, 45, 49, 44, 43, 42, 41, 40, 19, 14, 13, 12, 11, 10, 8, 7, 6, 5, 88, 5, 6, 7, 8, 10, 8, 7, 6, 5, 88, 87, 86, 85, 89, 84, 83, 82, 81, 80, 78, 77, 76, 75, 79, 74, 73, 72, 71, 70]

cp's OEIS Frontend

A387014 Middle element of the list {1, 2, 3, ..., 2n-1} when elements are sorted lexicographically by their Roman numeral representations.

Table of values

List of values

n	a(n)
1	1
2	2
3	3
4	4
5	9
6	5
7	6
8	7
9	8
10	10
11	11
12	12
13	13
14	14
15	19
16	15
17	16
18	17
19	18
20	20
21	18
22	17
23	16
24	15
25	48
26	47
27	46
28	45
29	49
30	44
31	43
32	42
33	41
34	40
35	19
36	14
37	13
38	12
39	11
40	10
41	8
42	7
43	6
44	5
45	88
46	5
47	6
48	7
49	8
50	10
51	8
52	7
53	6
54	5
55	88
56	87
57	86
58	85
59	89
60	84
61	83
62	82
63	81
64	80
65	78
66	77
67	76
68	75
69	79
70	74
71	73
72	72
73	71
74	70

n	a(n)
1	1
2	2
3	3
4	4
5	9
6	5
7	6
8	7
9	8
10	10
11	11
12	12
13	13
14	14
15	19
16	15
17	16
18	17
19	18
20	20
21	18
22	17
23	16
24	15
25	48
26	47
27	46
28	45
29	49
30	44
31	43
32	42
33	41
34	40
35	19
36	14
37	13
38	12
39	11
40	10
41	8
42	7
43	6
44	5
45	88
46	5
47	6
48	7
49	8
50	10
51	8
52	7
53	6
54	5
55	88
56	87
57	86
58	85
59	89
60	84
61	83
62	82
63	81
64	80
65	78
66	77
67	76
68	75
69	79
70	74
71	73
72	72
73	71
74	70

n	a(n)
1	1
2	2
3	3
4	4
5	9
6	5
7	6
8	7
9	8
10	10
11	11
12	12
13	13
14	14
15	19
16	15
17	16
18	17
19	18
20	20
21	18
22	17
23	16
24	15
25	48
26	47
27	46
28	45
29	49
30	44
31	43
32	42
33	41
34	40
35	19
36	14
37	13
38	12
39	11
40	10
41	8
42	7
43	6
44	5
45	88
46	5
47	6
48	7
49	8
50	10
51	8
52	7
53	6
54	5
55	88
56	87
57	86
58	85
59	89
60	84
61	83
62	82
63	81
64	80
65	78
66	77
67	76
68	75
69	79
70	74
71	73
72	72
73	71
74	70