A082002 - cp's OEIS frontend

A082002 Square array read by antidiagonals, alternating upwards and downwards: T(1, 1) = 1 and every other entry is the smallest number not already used that has a common factor with every number in its row and column, not including the 1.

n	a(n)
1	1
2	2
3	3
4	6
5	12
6	4
7	8
8	18
9	10
10	9
11	15
12	24
13	14
14	30
15	16
16	20
17	36
18	22
19	42
20	40
21	21
22	27
23	28
24	48
25	54
26	26
27	45
28	32
29	34
30	60
31	50
32	66
33	70
34	56
35	72
36	33
37	39
38	44
39	78
40	84
41	80
42	75
43	38
44	51
45	46
46	52
47	69
48	68
49	90
50	96
51	98
52	102
53	88
54	104
55	57
56	63
57	76
58	108
59	110
60	114
61	105
62	100
63	120
64	92
65	117
66	58
67	62
68	87
69	126

[1, 2, 3, 6, 12, 4, 8, 18, 10, 9, 15, 24, 14, 30, 16, 20, 36, 22, 42, 40, 21, 27, 28, 48, 54, 26, 45, 32, 34, 60, 50, 66, 70, 56, 72, 33, 39, 44, 78, 84, 80, 75, 38, 51, 46, 52, 69, 68, 90, 96, 98, 102, 88, 104, 57, 63, 76, 108, 110, 114, 105, 100, 120, 92, 117, 58, 62, 87, 126]

cp's OEIS Frontend

A082002 Square array read by antidiagonals, alternating upwards and downwards: T(1, 1) = 1 and every other entry is the smallest number not already used that has a common factor with every number in its row and column, not including the 1.

Table of values

List of values

n	a(n)
1	1
2	2
3	3
4	6
5	12
6	4
7	8
8	18
9	10
10	9
11	15
12	24
13	14
14	30
15	16
16	20
17	36
18	22
19	42
20	40
21	21
22	27
23	28
24	48
25	54
26	26
27	45
28	32
29	34
30	60
31	50
32	66
33	70
34	56
35	72
36	33
37	39
38	44
39	78
40	84
41	80
42	75
43	38
44	51
45	46
46	52
47	69
48	68
49	90
50	96
51	98
52	102
53	88
54	104
55	57
56	63
57	76
58	108
59	110
60	114
61	105
62	100
63	120
64	92
65	117
66	58
67	62
68	87
69	126

n	a(n)
1	1
2	2
3	3
4	6
5	12
6	4
7	8
8	18
9	10
10	9
11	15
12	24
13	14
14	30
15	16
16	20
17	36
18	22
19	42
20	40
21	21
22	27
23	28
24	48
25	54
26	26
27	45
28	32
29	34
30	60
31	50
32	66
33	70
34	56
35	72
36	33
37	39
38	44
39	78
40	84
41	80
42	75
43	38
44	51
45	46
46	52
47	69
48	68
49	90
50	96
51	98
52	102
53	88
54	104
55	57
56	63
57	76
58	108
59	110
60	114
61	105
62	100
63	120
64	92
65	117
66	58
67	62
68	87
69	126

n	a(n)
1	1
2	2
3	3
4	6
5	12
6	4
7	8
8	18
9	10
10	9
11	15
12	24
13	14
14	30
15	16
16	20
17	36
18	22
19	42
20	40
21	21
22	27
23	28
24	48
25	54
26	26
27	45
28	32
29	34
30	60
31	50
32	66
33	70
34	56
35	72
36	33
37	39
38	44
39	78
40	84
41	80
42	75
43	38
44	51
45	46
46	52
47	69
48	68
49	90
50	96
51	98
52	102
53	88
54	104
55	57
56	63
57	76
58	108
59	110
60	114
61	105
62	100
63	120
64	92
65	117
66	58
67	62
68	87
69	126