A246946 - cp's OEIS frontend

A246946 a(1)=6; for n > 1, a(n) is the least integer not occurring earlier such that a(n) shares exactly two distinct prime divisors with a(n-1).

n	a(n)
1	6
2	12
3	18
4	24
5	30
6	10
7	20
8	40
9	50
10	60
11	15
12	45
13	75
14	90
15	36
16	42
17	14
18	28
19	56
20	70
21	35
22	105
23	21
24	63
25	84
26	48
27	54
28	66
29	22
30	44
31	88
32	110
33	55
34	165
35	33
36	99
37	132
38	72
39	78
40	26
41	52
42	104
43	130
44	65
45	195
46	39
47	117
48	156
49	96
50	102
51	34
52	68
53	136
54	170
55	80
56	100
57	120
58	108
59	114
60	38
61	76

[6, 12, 18, 24, 30, 10, 20, 40, 50, 60, 15, 45, 75, 90, 36, 42, 14, 28, 56, 70, 35, 105, 21, 63, 84, 48, 54, 66, 22, 44, 88, 110, 55, 165, 33, 99, 132, 72, 78, 26, 52, 104, 130, 65, 195, 39, 117, 156, 96, 102, 34, 68, 136, 170, 80, 100, 120, 108, 114, 38, 76]

cp's OEIS Frontend

A246946 a(1)=6; for n > 1, a(n) is the least integer not occurring earlier such that a(n) shares exactly two distinct prime divisors with a(n-1).

Table of values

List of values

n	a(n)
1	6
2	12
3	18
4	24
5	30
6	10
7	20
8	40
9	50
10	60
11	15
12	45
13	75
14	90
15	36
16	42
17	14
18	28
19	56
20	70
21	35
22	105
23	21
24	63
25	84
26	48
27	54
28	66
29	22
30	44
31	88
32	110
33	55
34	165
35	33
36	99
37	132
38	72
39	78
40	26
41	52
42	104
43	130
44	65
45	195
46	39
47	117
48	156
49	96
50	102
51	34
52	68
53	136
54	170
55	80
56	100
57	120
58	108
59	114
60	38
61	76

n	a(n)
1	6
2	12
3	18
4	24
5	30
6	10
7	20
8	40
9	50
10	60
11	15
12	45
13	75
14	90
15	36
16	42
17	14
18	28
19	56
20	70
21	35
22	105
23	21
24	63
25	84
26	48
27	54
28	66
29	22
30	44
31	88
32	110
33	55
34	165
35	33
36	99
37	132
38	72
39	78
40	26
41	52
42	104
43	130
44	65
45	195
46	39
47	117
48	156
49	96
50	102
51	34
52	68
53	136
54	170
55	80
56	100
57	120
58	108
59	114
60	38
61	76

n	a(n)
1	6
2	12
3	18
4	24
5	30
6	10
7	20
8	40
9	50
10	60
11	15
12	45
13	75
14	90
15	36
16	42
17	14
18	28
19	56
20	70
21	35
22	105
23	21
24	63
25	84
26	48
27	54
28	66
29	22
30	44
31	88
32	110
33	55
34	165
35	33
36	99
37	132
38	72
39	78
40	26
41	52
42	104
43	130
44	65
45	195
46	39
47	117
48	156
49	96
50	102
51	34
52	68
53	136
54	170
55	80
56	100
57	120
58	108
59	114
60	38
61	76