A057226 - cp's OEIS frontend

A057226 Number of different symbols needed to express n as a Roman numeral.

n	a(n)
1	1
2	1
3	1
4	2
5	1
6	2
7	2
8	2
9	2
10	1
11	2
12	2
13	2
14	3
15	2
16	3
17	3
18	3
19	2
20	1
21	2
22	2
23	2
24	3
25	2
26	3
27	3
28	3
29	2
30	1
31	2
32	2
33	2
34	3
35	2
36	3
37	3
38	3
39	2
40	2
41	3
42	3
43	3
44	4
45	3
46	4
47	4
48	4
49	3
50	1
51	2
52	2
53	2
54	3
55	2
56	3
57	3
58	3
59	3
60	2
61	3
62	3
63	3
64	4
65	3
66	4
67	4
68	4
69	3
70	2
71	3
72	3
73	3
74	4
75	3
76	4
77	4
78	4
79	3
80	2
81	3
82	3
83	3
84	4
85	3
86	4
87	4
88	4
89	3
90	2
91	3
92	3
93	3
94	4
95	3
96	4
97	4
98	4
99	3
100	1
101	2
102	2
103	2
104	3
105	2

[1, 1, 1, 2, 1, 2, 2, 2, 2, 1, 2, 2, 2, 3, 2, 3, 3, 3, 2, 1, 2, 2, 2, 3, 2, 3, 3, 3, 2, 1, 2, 2, 2, 3, 2, 3, 3, 3, 2, 2, 3, 3, 3, 4, 3, 4, 4, 4, 3, 1, 2, 2, 2, 3, 2, 3, 3, 3, 3, 2, 3, 3, 3, 4, 3, 4, 4, 4, 3, 2, 3, 3, 3, 4, 3, 4, 4, 4, 3, 2, 3, 3, 3, 4, 3, 4, 4, 4, 3, 2, 3, 3, 3, 4, 3, 4, 4, 4, 3, 1, 2, 2, 2, 3, 2]

cp's OEIS Frontend

A057226 Number of different symbols needed to express n as a Roman numeral.

Table of values

List of values

n	a(n)
1	1
2	1
3	1
4	2
5	1
6	2
7	2
8	2
9	2
10	1
11	2
12	2
13	2
14	3
15	2
16	3
17	3
18	3
19	2
20	1
21	2
22	2
23	2
24	3
25	2
26	3
27	3
28	3
29	2
30	1
31	2
32	2
33	2
34	3
35	2
36	3
37	3
38	3
39	2
40	2
41	3
42	3
43	3
44	4
45	3
46	4
47	4
48	4
49	3
50	1
51	2
52	2
53	2
54	3
55	2
56	3
57	3
58	3
59	3
60	2
61	3
62	3
63	3
64	4
65	3
66	4
67	4
68	4
69	3
70	2
71	3
72	3
73	3
74	4
75	3
76	4
77	4
78	4
79	3
80	2
81	3
82	3
83	3
84	4
85	3
86	4
87	4
88	4
89	3
90	2
91	3
92	3
93	3
94	4
95	3
96	4
97	4
98	4
99	3
100	1
101	2
102	2
103	2
104	3
105	2

n	a(n)
1	1
2	1
3	1
4	2
5	1
6	2
7	2
8	2
9	2
10	1
11	2
12	2
13	2
14	3
15	2
16	3
17	3
18	3
19	2
20	1
21	2
22	2
23	2
24	3
25	2
26	3
27	3
28	3
29	2
30	1
31	2
32	2
33	2
34	3
35	2
36	3
37	3
38	3
39	2
40	2
41	3
42	3
43	3
44	4
45	3
46	4
47	4
48	4
49	3
50	1
51	2
52	2
53	2
54	3
55	2
56	3
57	3
58	3
59	3
60	2
61	3
62	3
63	3
64	4
65	3
66	4
67	4
68	4
69	3
70	2
71	3
72	3
73	3
74	4
75	3
76	4
77	4
78	4
79	3
80	2
81	3
82	3
83	3
84	4
85	3
86	4
87	4
88	4
89	3
90	2
91	3
92	3
93	3
94	4
95	3
96	4
97	4
98	4
99	3
100	1
101	2
102	2
103	2
104	3
105	2

n	a(n)
1	1
2	1
3	1
4	2
5	1
6	2
7	2
8	2
9	2
10	1
11	2
12	2
13	2
14	3
15	2
16	3
17	3
18	3
19	2
20	1
21	2
22	2
23	2
24	3
25	2
26	3
27	3
28	3
29	2
30	1
31	2
32	2
33	2
34	3
35	2
36	3
37	3
38	3
39	2
40	2
41	3
42	3
43	3
44	4
45	3
46	4
47	4
48	4
49	3
50	1
51	2
52	2
53	2
54	3
55	2
56	3
57	3
58	3
59	3
60	2
61	3
62	3
63	3
64	4
65	3
66	4
67	4
68	4
69	3
70	2
71	3
72	3
73	3
74	4
75	3
76	4
77	4
78	4
79	3
80	2
81	3
82	3
83	3
84	4
85	3
86	4
87	4
88	4
89	3
90	2
91	3
92	3
93	3
94	4
95	3
96	4
97	4
98	4
99	3
100	1
101	2
102	2
103	2
104	3
105	2