A252753 - cp's OEIS frontend

A252753 Tree of Eratosthenes: a(0) = 1, a(1) = 2; after which, a(2n) = A250469(a(n)), a(2n+1) = 2 * a(n).

n	a(n)
0	1
1	2
2	3
3	4
4	5
5	6
6	9
7	8
8	7
9	10
10	15
11	12
12	25
13	18
14	21
15	16
16	11
17	14
18	27
19	20
20	35
21	30
22	33
23	24
24	49
25	50
26	51
27	36
28	55
29	42
30	45
31	32
32	13
33	22
34	39
35	28
36	65
37	54
38	57
39	40
40	77
41	70
42	87
43	60
44	85
45	66
46	69
47	48
48	121
49	98
50	147
51	100
52	125
53	102
54	105
55	72
56	91
57	110
58	123
59	84
60	115
61	90
62	93
63	64
64	17
65	26
66	63
67	44
68	95
69	78
70	81
71	56
72	119
73	130
74	159
75	108
76	145
77	114
78	117
79	80

[1, 2, 3, 4, 5, 6, 9, 8, 7, 10, 15, 12, 25, 18, 21, 16, 11, 14, 27, 20, 35, 30, 33, 24, 49, 50, 51, 36, 55, 42, 45, 32, 13, 22, 39, 28, 65, 54, 57, 40, 77, 70, 87, 60, 85, 66, 69, 48, 121, 98, 147, 100, 125, 102, 105, 72, 91, 110, 123, 84, 115, 90, 93, 64, 17, 26, 63, 44, 95, 78, 81, 56, 119, 130, 159, 108, 145, 114, 117, 80]

cp's OEIS Frontend

A252753 Tree of Eratosthenes: a(0) = 1, a(1) = 2; after which, a(2n) = A250469(a(n)), a(2n+1) = 2 * a(n).

Table of values

List of values

n	a(n)
0	1
1	2
2	3
3	4
4	5
5	6
6	9
7	8
8	7
9	10
10	15
11	12
12	25
13	18
14	21
15	16
16	11
17	14
18	27
19	20
20	35
21	30
22	33
23	24
24	49
25	50
26	51
27	36
28	55
29	42
30	45
31	32
32	13
33	22
34	39
35	28
36	65
37	54
38	57
39	40
40	77
41	70
42	87
43	60
44	85
45	66
46	69
47	48
48	121
49	98
50	147
51	100
52	125
53	102
54	105
55	72
56	91
57	110
58	123
59	84
60	115
61	90
62	93
63	64
64	17
65	26
66	63
67	44
68	95
69	78
70	81
71	56
72	119
73	130
74	159
75	108
76	145
77	114
78	117
79	80

n	a(n)
0	1
1	2
2	3
3	4
4	5
5	6
6	9
7	8
8	7
9	10
10	15
11	12
12	25
13	18
14	21
15	16
16	11
17	14
18	27
19	20
20	35
21	30
22	33
23	24
24	49
25	50
26	51
27	36
28	55
29	42
30	45
31	32
32	13
33	22
34	39
35	28
36	65
37	54
38	57
39	40
40	77
41	70
42	87
43	60
44	85
45	66
46	69
47	48
48	121
49	98
50	147
51	100
52	125
53	102
54	105
55	72
56	91
57	110
58	123
59	84
60	115
61	90
62	93
63	64
64	17
65	26
66	63
67	44
68	95
69	78
70	81
71	56
72	119
73	130
74	159
75	108
76	145
77	114
78	117
79	80

n	a(n)
0	1
1	2
2	3
3	4
4	5
5	6
6	9
7	8
8	7
9	10
10	15
11	12
12	25
13	18
14	21
15	16
16	11
17	14
18	27
19	20
20	35
21	30
22	33
23	24
24	49
25	50
26	51
27	36
28	55
29	42
30	45
31	32
32	13
33	22
34	39
35	28
36	65
37	54
38	57
39	40
40	77
41	70
42	87
43	60
44	85
45	66
46	69
47	48
48	121
49	98
50	147
51	100
52	125
53	102
54	105
55	72
56	91
57	110
58	123
59	84
60	115
61	90
62	93
63	64
64	17
65	26
66	63
67	44
68	95
69	78
70	81
71	56
72	119
73	130
74	159
75	108
76	145
77	114
78	117
79	80