A101513 - cp's OEIS frontend

A101513 a(1) = 1, a(2) = 2, a(3) = 3; triangle where n-th row has lowest n positive integers not yet in the sequence such that each integer has a prime divisor in common with at least one element of the (n-1)th row.

n	a(n)
1	1
2	2
3	3
4	4
5	6
6	8
7	9
8	10
9	12
10	14
11	5
12	7
13	15
14	16
15	18
16	20
17	21
18	22
19	24
20	25
21	26
22	11
23	13
24	27
25	28
26	30
27	32
28	33
29	34
30	35
31	36
32	38
33	39
34	40
35	42
36	44
37	17
38	19
39	45
40	46
41	48
42	49
43	50
44	51
45	52
46	23
47	54
48	55
49	56
50	57
51	58
52	60
53	62
54	63
55	64
56	29
57	31
58	65
59	66
60	68
61	69
62	70
63	72
64	74
65	75
66	76
67	37
68	77
69	78
70	80
71	81
72	82

[1, 2, 3, 4, 6, 8, 9, 10, 12, 14, 5, 7, 15, 16, 18, 20, 21, 22, 24, 25, 26, 11, 13, 27, 28, 30, 32, 33, 34, 35, 36, 38, 39, 40, 42, 44, 17, 19, 45, 46, 48, 49, 50, 51, 52, 23, 54, 55, 56, 57, 58, 60, 62, 63, 64, 29, 31, 65, 66, 68, 69, 70, 72, 74, 75, 76, 37, 77, 78, 80, 81, 82]

cp's OEIS Frontend

A101513 a(1) = 1, a(2) = 2, a(3) = 3; triangle where n-th row has lowest n positive integers not yet in the sequence such that each integer has a prime divisor in common with at least one element of the (n-1)th row.

Table of values

List of values

n	a(n)
1	1
2	2
3	3
4	4
5	6
6	8
7	9
8	10
9	12
10	14
11	5
12	7
13	15
14	16
15	18
16	20
17	21
18	22
19	24
20	25
21	26
22	11
23	13
24	27
25	28
26	30
27	32
28	33
29	34
30	35
31	36
32	38
33	39
34	40
35	42
36	44
37	17
38	19
39	45
40	46
41	48
42	49
43	50
44	51
45	52
46	23
47	54
48	55
49	56
50	57
51	58
52	60
53	62
54	63
55	64
56	29
57	31
58	65
59	66
60	68
61	69
62	70
63	72
64	74
65	75
66	76
67	37
68	77
69	78
70	80
71	81
72	82

n	a(n)
1	1
2	2
3	3
4	4
5	6
6	8
7	9
8	10
9	12
10	14
11	5
12	7
13	15
14	16
15	18
16	20
17	21
18	22
19	24
20	25
21	26
22	11
23	13
24	27
25	28
26	30
27	32
28	33
29	34
30	35
31	36
32	38
33	39
34	40
35	42
36	44
37	17
38	19
39	45
40	46
41	48
42	49
43	50
44	51
45	52
46	23
47	54
48	55
49	56
50	57
51	58
52	60
53	62
54	63
55	64
56	29
57	31
58	65
59	66
60	68
61	69
62	70
63	72
64	74
65	75
66	76
67	37
68	77
69	78
70	80
71	81
72	82

n	a(n)
1	1
2	2
3	3
4	4
5	6
6	8
7	9
8	10
9	12
10	14
11	5
12	7
13	15
14	16
15	18
16	20
17	21
18	22
19	24
20	25
21	26
22	11
23	13
24	27
25	28
26	30
27	32
28	33
29	34
30	35
31	36
32	38
33	39
34	40
35	42
36	44
37	17
38	19
39	45
40	46
41	48
42	49
43	50
44	51
45	52
46	23
47	54
48	55
49	56
50	57
51	58
52	60
53	62
54	63
55	64
56	29
57	31
58	65
59	66
60	68
61	69
62	70
63	72
64	74
65	75
66	76
67	37
68	77
69	78
70	80
71	81
72	82