A249917 - cp's OEIS frontend

A249917 Square array read by antidiagonals where the n-th row lists the integers x such that gcd(x, sigma(x)) = n.

n	a(n)
1	1
2	2
3	10
4	3
5	14
6	15
7	4
8	20
9	18
10	12
11	5
12	22
13	33
14	44
15	95
16	7
17	26
18	45
19	48
20	145
21	6
22	8
23	34
24	51
25	76
26	200
27	30
28	91
29	9
30	38
31	69
32	88
33	295
34	42
35	196
36	56
37	11
38	46
39	72
40	92
41	395
42	54
43	273
44	112
45	153
46	13
47	52
48	87
49	108
50	445
51	66
52	287
53	184
54	288
55	40
56	16
57	58
58	99
59	124
60	475
61	78
62	455
63	248
64	459
65	190
66	473

[1, 2, 10, 3, 14, 15, 4, 20, 18, 12, 5, 22, 33, 44, 95, 7, 26, 45, 48, 145, 6, 8, 34, 51, 76, 200, 30, 91, 9, 38, 69, 88, 295, 42, 196, 56, 11, 46, 72, 92, 395, 54, 273, 112, 153, 13, 52, 87, 108, 445, 66, 287, 184, 288, 40, 16, 58, 99, 124, 475, 78, 455, 248, 459, 190, 473]

cp's OEIS Frontend

A249917 Square array read by antidiagonals where the n-th row lists the integers x such that gcd(x, sigma(x)) = n.

Table of values

List of values

n	a(n)
1	1
2	2
3	10
4	3
5	14
6	15
7	4
8	20
9	18
10	12
11	5
12	22
13	33
14	44
15	95
16	7
17	26
18	45
19	48
20	145
21	6
22	8
23	34
24	51
25	76
26	200
27	30
28	91
29	9
30	38
31	69
32	88
33	295
34	42
35	196
36	56
37	11
38	46
39	72
40	92
41	395
42	54
43	273
44	112
45	153
46	13
47	52
48	87
49	108
50	445
51	66
52	287
53	184
54	288
55	40
56	16
57	58
58	99
59	124
60	475
61	78
62	455
63	248
64	459
65	190
66	473

n	a(n)
1	1
2	2
3	10
4	3
5	14
6	15
7	4
8	20
9	18
10	12
11	5
12	22
13	33
14	44
15	95
16	7
17	26
18	45
19	48
20	145
21	6
22	8
23	34
24	51
25	76
26	200
27	30
28	91
29	9
30	38
31	69
32	88
33	295
34	42
35	196
36	56
37	11
38	46
39	72
40	92
41	395
42	54
43	273
44	112
45	153
46	13
47	52
48	87
49	108
50	445
51	66
52	287
53	184
54	288
55	40
56	16
57	58
58	99
59	124
60	475
61	78
62	455
63	248
64	459
65	190
66	473

n	a(n)
1	1
2	2
3	10
4	3
5	14
6	15
7	4
8	20
9	18
10	12
11	5
12	22
13	33
14	44
15	95
16	7
17	26
18	45
19	48
20	145
21	6
22	8
23	34
24	51
25	76
26	200
27	30
28	91
29	9
30	38
31	69
32	88
33	295
34	42
35	196
36	56
37	11
38	46
39	72
40	92
41	395
42	54
43	273
44	112
45	153
46	13
47	52
48	87
49	108
50	445
51	66
52	287
53	184
54	288
55	40
56	16
57	58
58	99
59	124
60	475
61	78
62	455
63	248
64	459
65	190
66	473