A109852 - cp's OEIS frontend

A109852 a(1)=1; a(2) = 2; for n >= 1 and 1 <= k < 2^n, a(2^n+k) is the least multiple of a(2^n-k) not included earlier and a(2^n) is the least number not included earlier.

n	a(n)
1	1
2	2
3	3
4	4
5	6
6	8
7	5
8	7
9	10
10	16
11	12
12	20
13	9
14	14
15	11
16	13
17	22
18	28
19	18
20	40
21	24
22	32
23	30
24	21
25	15
26	48
27	36
28	44
29	27
30	26
31	17
32	19
33	34
34	52
35	54
36	88
37	72
38	96
39	45
40	42
41	60
42	64
43	120
44	80
45	90
46	56
47	66
48	39
49	33
50	70
51	63
52	100
53	84
54	112
55	50
56	35
57	25
58	104
59	78
60	68
61	51
62	38
63	23
64	29
65	46
66	76
67	102
68	136
69	156
70	208

[1, 2, 3, 4, 6, 8, 5, 7, 10, 16, 12, 20, 9, 14, 11, 13, 22, 28, 18, 40, 24, 32, 30, 21, 15, 48, 36, 44, 27, 26, 17, 19, 34, 52, 54, 88, 72, 96, 45, 42, 60, 64, 120, 80, 90, 56, 66, 39, 33, 70, 63, 100, 84, 112, 50, 35, 25, 104, 78, 68, 51, 38, 23, 29, 46, 76, 102, 136, 156, 208]

cp's OEIS Frontend

A109852 a(1)=1; a(2) = 2; for n >= 1 and 1 <= k < 2^n, a(2^n+k) is the least multiple of a(2^n-k) not included earlier and a(2^n) is the least number not included earlier.

Table of values

List of values

n	a(n)
1	1
2	2
3	3
4	4
5	6
6	8
7	5
8	7
9	10
10	16
11	12
12	20
13	9
14	14
15	11
16	13
17	22
18	28
19	18
20	40
21	24
22	32
23	30
24	21
25	15
26	48
27	36
28	44
29	27
30	26
31	17
32	19
33	34
34	52
35	54
36	88
37	72
38	96
39	45
40	42
41	60
42	64
43	120
44	80
45	90
46	56
47	66
48	39
49	33
50	70
51	63
52	100
53	84
54	112
55	50
56	35
57	25
58	104
59	78
60	68
61	51
62	38
63	23
64	29
65	46
66	76
67	102
68	136
69	156
70	208

n	a(n)
1	1
2	2
3	3
4	4
5	6
6	8
7	5
8	7
9	10
10	16
11	12
12	20
13	9
14	14
15	11
16	13
17	22
18	28
19	18
20	40
21	24
22	32
23	30
24	21
25	15
26	48
27	36
28	44
29	27
30	26
31	17
32	19
33	34
34	52
35	54
36	88
37	72
38	96
39	45
40	42
41	60
42	64
43	120
44	80
45	90
46	56
47	66
48	39
49	33
50	70
51	63
52	100
53	84
54	112
55	50
56	35
57	25
58	104
59	78
60	68
61	51
62	38
63	23
64	29
65	46
66	76
67	102
68	136
69	156
70	208

n	a(n)
1	1
2	2
3	3
4	4
5	6
6	8
7	5
8	7
9	10
10	16
11	12
12	20
13	9
14	14
15	11
16	13
17	22
18	28
19	18
20	40
21	24
22	32
23	30
24	21
25	15
26	48
27	36
28	44
29	27
30	26
31	17
32	19
33	34
34	52
35	54
36	88
37	72
38	96
39	45
40	42
41	60
42	64
43	120
44	80
45	90
46	56
47	66
48	39
49	33
50	70
51	63
52	100
53	84
54	112
55	50
56	35
57	25
58	104
59	78
60	68
61	51
62	38
63	23
64	29
65	46
66	76
67	102
68	136
69	156
70	208