A333970 - cp's OEIS frontend

A333970 Irregular triangle read by rows where the n-th row lists the bases 2<=b<=n+1 where n in base b contains the digit b-1.

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

[2, 2, 3, 2, 4, 2, 5, 2, 3, 6, 2, 3, 7, 2, 3, 4, 8, 2, 3, 9, 2, 5, 10, 2, 11, 2, 3, 4, 6, 12, 2, 4, 13, 2, 4, 7, 14, 2, 3, 4, 5, 15, 2, 3, 4, 8, 16, 2, 3, 17, 2, 3, 6, 9, 18, 2, 3, 19, 2, 3, 4, 5, 10, 20, 2, 3, 5, 7, 21, 2, 3, 5, 11, 22, 2, 3, 5, 23, 2, 3, 4, 5, 6, 8, 12, 24]

cp's OEIS Frontend

A333970 Irregular triangle read by rows where the n-th row lists the bases 2<=b<=n+1 where n in base b contains the digit b-1.

Table of values

List of values

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

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

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