A321882 - cp's OEIS frontend

A321882 a(n) is the least base b > 1 such that the sum n + n can be computed without carry.

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

[2, 3, 5, 3, 3, 4, 5, 5, 6, 3, 3, 5, 3, 3, 6, 7, 4, 4, 8, 8, 4, 4, 7, 7, 7, 5, 5, 3, 3, 9, 3, 3, 5, 10, 10, 5, 3, 3, 6, 3, 3, 10, 6, 6, 6, 11, 11, 11, 6, 6, 5, 5, 5, 12, 13, 5, 5, 5, 7, 7, 5, 5, 5, 7, 4, 4, 7, 8, 4, 4, 7, 7, 6, 6, 6, 8, 14, 15, 6, 6, 4, 3, 3, 8]

cp's OEIS Frontend

A321882 a(n) is the least base b > 1 such that the sum n + n can be computed without carry.

Table of values

List of values

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

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

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