A323460 - cp's OEIS frontend

A323460 Choix de Bruxelles, version 2: irregular table read by rows in which row n lists all the legal numbers that can be reached by halving or doubling some substring of the decimal expansion of n (including the empty string).

n	a(n)
1	1
2	2
3	1
4	2
5	4
6	3
7	6
8	2
9	4
10	8
11	5
12	10
13	3
14	6
15	12
16	7
17	14
18	4
19	8
20	16
21	9
22	18
23	5
24	10
25	20
26	11
27	12
28	21
29	22
30	6
31	11
32	12
33	14
34	22
35	24
36	13
37	16
38	23
39	26
40	7
41	12
42	14
43	18
44	24
45	28
46	15
47	25
48	30
49	110
50	8
51	13
52	16
53	26
54	32
55	112
56	17
57	27
58	34
59	114
60	9
61	14
62	18
63	28
64	36
65	116
66	19
67	29
68	38

[1, 2, 1, 2, 4, 3, 6, 2, 4, 8, 5, 10, 3, 6, 12, 7, 14, 4, 8, 16, 9, 18, 5, 10, 20, 11, 12, 21, 22, 6, 11, 12, 14, 22, 24, 13, 16, 23, 26, 7, 12, 14, 18, 24, 28, 15, 25, 30, 110, 8, 13, 16, 26, 32, 112, 17, 27, 34, 114, 9, 14, 18, 28, 36, 116, 19, 29, 38]

cp's OEIS Frontend

A323460 Choix de Bruxelles, version 2: irregular table read by rows in which row n lists all the legal numbers that can be reached by halving or doubling some substring of the decimal expansion of n (including the empty string).

Table of values

List of values

n	a(n)
1	1
2	2
3	1
4	2
5	4
6	3
7	6
8	2
9	4
10	8
11	5
12	10
13	3
14	6
15	12
16	7
17	14
18	4
19	8
20	16
21	9
22	18
23	5
24	10
25	20
26	11
27	12
28	21
29	22
30	6
31	11
32	12
33	14
34	22
35	24
36	13
37	16
38	23
39	26
40	7
41	12
42	14
43	18
44	24
45	28
46	15
47	25
48	30
49	110
50	8
51	13
52	16
53	26
54	32
55	112
56	17
57	27
58	34
59	114
60	9
61	14
62	18
63	28
64	36
65	116
66	19
67	29
68	38

n	a(n)
1	1
2	2
3	1
4	2
5	4
6	3
7	6
8	2
9	4
10	8
11	5
12	10
13	3
14	6
15	12
16	7
17	14
18	4
19	8
20	16
21	9
22	18
23	5
24	10
25	20
26	11
27	12
28	21
29	22
30	6
31	11
32	12
33	14
34	22
35	24
36	13
37	16
38	23
39	26
40	7
41	12
42	14
43	18
44	24
45	28
46	15
47	25
48	30
49	110
50	8
51	13
52	16
53	26
54	32
55	112
56	17
57	27
58	34
59	114
60	9
61	14
62	18
63	28
64	36
65	116
66	19
67	29
68	38

n	a(n)
1	1
2	2
3	1
4	2
5	4
6	3
7	6
8	2
9	4
10	8
11	5
12	10
13	3
14	6
15	12
16	7
17	14
18	4
19	8
20	16
21	9
22	18
23	5
24	10
25	20
26	11
27	12
28	21
29	22
30	6
31	11
32	12
33	14
34	22
35	24
36	13
37	16
38	23
39	26
40	7
41	12
42	14
43	18
44	24
45	28
46	15
47	25
48	30
49	110
50	8
51	13
52	16
53	26
54	32
55	112
56	17
57	27
58	34
59	114
60	9
61	14
62	18
63	28
64	36
65	116
66	19
67	29
68	38