A356384 - cp's OEIS frontend

A356384 For any n >= 0, let x_n(1) = n, and for any b > 1, x_n(b) = x_n(b-1) minus the sum of digits of x_n(b-1) in base b; a(n) is the least b such that x_n(b) = 0.

n	a(n)
0	1
1	2
2	3
3	3
4	4
5	4
6	4
7	4
8	5
9	5
10	5
11	5
12	6
13	6
14	6
15	6
16	6
17	6
18	6
19	6
20	8
21	8
22	8
23	8
24	8
25	8
26	8
27	8
28	8
29	8
30	8
31	8
32	8
33	8
34	8
35	8
36	8
37	8
38	8
39	8
40	9
41	9
42	9
43	9
44	9
45	9
46	9
47	9
48	10
49	10
50	10
51	10
52	10
53	10
54	10
55	10
56	10
57	10
58	11
59	11
60	11
61	11
62	11
63	11
64	12
65	12
66	12
67	12
68	12
69	12
70	12
71	12
72	13
73	13
74	13
75	13
76	13

[1, 2, 3, 3, 4, 4, 4, 4, 5, 5, 5, 5, 6, 6, 6, 6, 6, 6, 6, 6, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 9, 9, 9, 9, 9, 9, 9, 9, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 11, 11, 11, 11, 11, 11, 12, 12, 12, 12, 12, 12, 12, 12, 13, 13, 13, 13, 13]

cp's OEIS Frontend

A356384 For any n >= 0, let x_n(1) = n, and for any b > 1, x_n(b) = x_n(b-1) minus the sum of digits of x_n(b-1) in base b; a(n) is the least b such that x_n(b) = 0.

Table of values

List of values

n	a(n)
0	1
1	2
2	3
3	3
4	4
5	4
6	4
7	4
8	5
9	5
10	5
11	5
12	6
13	6
14	6
15	6
16	6
17	6
18	6
19	6
20	8
21	8
22	8
23	8
24	8
25	8
26	8
27	8
28	8
29	8
30	8
31	8
32	8
33	8
34	8
35	8
36	8
37	8
38	8
39	8
40	9
41	9
42	9
43	9
44	9
45	9
46	9
47	9
48	10
49	10
50	10
51	10
52	10
53	10
54	10
55	10
56	10
57	10
58	11
59	11
60	11
61	11
62	11
63	11
64	12
65	12
66	12
67	12
68	12
69	12
70	12
71	12
72	13
73	13
74	13
75	13
76	13

n	a(n)
0	1
1	2
2	3
3	3
4	4
5	4
6	4
7	4
8	5
9	5
10	5
11	5
12	6
13	6
14	6
15	6
16	6
17	6
18	6
19	6
20	8
21	8
22	8
23	8
24	8
25	8
26	8
27	8
28	8
29	8
30	8
31	8
32	8
33	8
34	8
35	8
36	8
37	8
38	8
39	8
40	9
41	9
42	9
43	9
44	9
45	9
46	9
47	9
48	10
49	10
50	10
51	10
52	10
53	10
54	10
55	10
56	10
57	10
58	11
59	11
60	11
61	11
62	11
63	11
64	12
65	12
66	12
67	12
68	12
69	12
70	12
71	12
72	13
73	13
74	13
75	13
76	13

n	a(n)
0	1
1	2
2	3
3	3
4	4
5	4
6	4
7	4
8	5
9	5
10	5
11	5
12	6
13	6
14	6
15	6
16	6
17	6
18	6
19	6
20	8
21	8
22	8
23	8
24	8
25	8
26	8
27	8
28	8
29	8
30	8
31	8
32	8
33	8
34	8
35	8
36	8
37	8
38	8
39	8
40	9
41	9
42	9
43	9
44	9
45	9
46	9
47	9
48	10
49	10
50	10
51	10
52	10
53	10
54	10
55	10
56	10
57	10
58	11
59	11
60	11
61	11
62	11
63	11
64	12
65	12
66	12
67	12
68	12
69	12
70	12
71	12
72	13
73	13
74	13
75	13
76	13