A118668 - cp's OEIS frontend

A118668 Number of distinct digits needed to write the n-th triangular number in decimal representation.

n	a(n)
0	1
1	1
2	1
3	1
4	2
5	2
6	2
7	2
8	2
9	2
10	1
11	1
12	2
13	2
14	3
15	3
16	3
17	3
18	2
19	3
20	3
21	3
22	3
23	3
24	2
25	3
26	3
27	3
28	3
29	3
30	3
31	3
32	3
33	3
34	2
35	3
36	1
37	3
38	3
39	3
40	3
41	3
42	3
43	3
44	2
45	4
46	3
47	3
48	3
49	3
50	4
51	4
52	4
53	3
54	4
55	4
56	4
57	4
58	2
59	3
60	4
61	3
62	4
63	4
64	3
65	4
66	2
67	3
68	4
69	4
70	4
71	3
72	3
73	4
74	3
75	4
76	3
77	2
78	4
79	4
80	4
81	3
82	3
83	4
84	4
85	3
86	4
87	3
88	4
89	3
90	4
91	4
92	4
93	4
94	3
95	4
96	3
97	4
98	4
99	4
100	2
101	2
102	3
103	3
104	4

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

cp's OEIS Frontend

A118668 Number of distinct digits needed to write the n-th triangular number in decimal representation.

Table of values

List of values

n	a(n)
0	1
1	1
2	1
3	1
4	2
5	2
6	2
7	2
8	2
9	2
10	1
11	1
12	2
13	2
14	3
15	3
16	3
17	3
18	2
19	3
20	3
21	3
22	3
23	3
24	2
25	3
26	3
27	3
28	3
29	3
30	3
31	3
32	3
33	3
34	2
35	3
36	1
37	3
38	3
39	3
40	3
41	3
42	3
43	3
44	2
45	4
46	3
47	3
48	3
49	3
50	4
51	4
52	4
53	3
54	4
55	4
56	4
57	4
58	2
59	3
60	4
61	3
62	4
63	4
64	3
65	4
66	2
67	3
68	4
69	4
70	4
71	3
72	3
73	4
74	3
75	4
76	3
77	2
78	4
79	4
80	4
81	3
82	3
83	4
84	4
85	3
86	4
87	3
88	4
89	3
90	4
91	4
92	4
93	4
94	3
95	4
96	3
97	4
98	4
99	4
100	2
101	2
102	3
103	3
104	4

n	a(n)
0	1
1	1
2	1
3	1
4	2
5	2
6	2
7	2
8	2
9	2
10	1
11	1
12	2
13	2
14	3
15	3
16	3
17	3
18	2
19	3
20	3
21	3
22	3
23	3
24	2
25	3
26	3
27	3
28	3
29	3
30	3
31	3
32	3
33	3
34	2
35	3
36	1
37	3
38	3
39	3
40	3
41	3
42	3
43	3
44	2
45	4
46	3
47	3
48	3
49	3
50	4
51	4
52	4
53	3
54	4
55	4
56	4
57	4
58	2
59	3
60	4
61	3
62	4
63	4
64	3
65	4
66	2
67	3
68	4
69	4
70	4
71	3
72	3
73	4
74	3
75	4
76	3
77	2
78	4
79	4
80	4
81	3
82	3
83	4
84	4
85	3
86	4
87	3
88	4
89	3
90	4
91	4
92	4
93	4
94	3
95	4
96	3
97	4
98	4
99	4
100	2
101	2
102	3
103	3
104	4

n	a(n)
0	1
1	1
2	1
3	1
4	2
5	2
6	2
7	2
8	2
9	2
10	1
11	1
12	2
13	2
14	3
15	3
16	3
17	3
18	2
19	3
20	3
21	3
22	3
23	3
24	2
25	3
26	3
27	3
28	3
29	3
30	3
31	3
32	3
33	3
34	2
35	3
36	1
37	3
38	3
39	3
40	3
41	3
42	3
43	3
44	2
45	4
46	3
47	3
48	3
49	3
50	4
51	4
52	4
53	3
54	4
55	4
56	4
57	4
58	2
59	3
60	4
61	3
62	4
63	4
64	3
65	4
66	2
67	3
68	4
69	4
70	4
71	3
72	3
73	4
74	3
75	4
76	3
77	2
78	4
79	4
80	4
81	3
82	3
83	4
84	4
85	3
86	4
87	3
88	4
89	3
90	4
91	4
92	4
93	4
94	3
95	4
96	3
97	4
98	4
99	4
100	2
101	2
102	3
103	3
104	4