A352763 - cp's OEIS frontend

A352763 a(1) = 1; a(2) = 2; for n > 2, a(n) is the smallest positive number that has not appeared that shares a factor with a(n-1) and whose binary expansion has no 1-bit in common with the binary expansion of a(n-1).

n	a(n)
1	1
2	2
3	4
4	8
5	6
6	9
7	18
8	12
9	3
10	24
11	32
12	10
13	5
14	40
15	16
16	14
17	48
18	15
19	80
20	34
21	17
22	68
23	26
24	36
25	27
26	96
27	20
28	35
29	28
30	64
31	22
32	33
33	30
34	65
35	50
36	72
37	21
38	42
39	69
40	138
41	52
42	66
43	44
44	82
45	41
46	656
47	38
48	88
49	128
50	46
51	144
52	39
53	192
54	45
55	130
56	13
57	208
58	256
59	54
60	129
61	60
62	194
63	56
64	7
65	112
66	132
67	11
68	176
69	70
70	25
71	100
72	136
73	51

[1, 2, 4, 8, 6, 9, 18, 12, 3, 24, 32, 10, 5, 40, 16, 14, 48, 15, 80, 34, 17, 68, 26, 36, 27, 96, 20, 35, 28, 64, 22, 33, 30, 65, 50, 72, 21, 42, 69, 138, 52, 66, 44, 82, 41, 656, 38, 88, 128, 46, 144, 39, 192, 45, 130, 13, 208, 256, 54, 129, 60, 194, 56, 7, 112, 132, 11, 176, 70, 25, 100, 136, 51]

cp's OEIS Frontend

A352763 a(1) = 1; a(2) = 2; for n > 2, a(n) is the smallest positive number that has not appeared that shares a factor with a(n-1) and whose binary expansion has no 1-bit in common with the binary expansion of a(n-1).

Table of values

List of values

n	a(n)
1	1
2	2
3	4
4	8
5	6
6	9
7	18
8	12
9	3
10	24
11	32
12	10
13	5
14	40
15	16
16	14
17	48
18	15
19	80
20	34
21	17
22	68
23	26
24	36
25	27
26	96
27	20
28	35
29	28
30	64
31	22
32	33
33	30
34	65
35	50
36	72
37	21
38	42
39	69
40	138
41	52
42	66
43	44
44	82
45	41
46	656
47	38
48	88
49	128
50	46
51	144
52	39
53	192
54	45
55	130
56	13
57	208
58	256
59	54
60	129
61	60
62	194
63	56
64	7
65	112
66	132
67	11
68	176
69	70
70	25
71	100
72	136
73	51

n	a(n)
1	1
2	2
3	4
4	8
5	6
6	9
7	18
8	12
9	3
10	24
11	32
12	10
13	5
14	40
15	16
16	14
17	48
18	15
19	80
20	34
21	17
22	68
23	26
24	36
25	27
26	96
27	20
28	35
29	28
30	64
31	22
32	33
33	30
34	65
35	50
36	72
37	21
38	42
39	69
40	138
41	52
42	66
43	44
44	82
45	41
46	656
47	38
48	88
49	128
50	46
51	144
52	39
53	192
54	45
55	130
56	13
57	208
58	256
59	54
60	129
61	60
62	194
63	56
64	7
65	112
66	132
67	11
68	176
69	70
70	25
71	100
72	136
73	51

n	a(n)
1	1
2	2
3	4
4	8
5	6
6	9
7	18
8	12
9	3
10	24
11	32
12	10
13	5
14	40
15	16
16	14
17	48
18	15
19	80
20	34
21	17
22	68
23	26
24	36
25	27
26	96
27	20
28	35
29	28
30	64
31	22
32	33
33	30
34	65
35	50
36	72
37	21
38	42
39	69
40	138
41	52
42	66
43	44
44	82
45	41
46	656
47	38
48	88
49	128
50	46
51	144
52	39
53	192
54	45
55	130
56	13
57	208
58	256
59	54
60	129
61	60
62	194
63	56
64	7
65	112
66	132
67	11
68	176
69	70
70	25
71	100
72	136
73	51