A319073 - cp's OEIS frontend

A319073 Square array read by antidiagonals upwards: T(n,k) = k*sigma(n), n >= 1, k >= 1.

n	a(n)
1	1
2	3
3	2
4	4
5	6
6	3
7	7
8	8
9	9
10	4
11	6
12	14
13	12
14	12
15	5
16	12
17	12
18	21
19	16
20	15
21	6
22	8
23	24
24	18
25	28
26	20
27	18
28	7
29	15
30	16
31	36
32	24
33	35
34	24
35	21
36	8
37	13
38	30
39	24
40	48
41	30
42	42
43	28
44	24
45	9
46	18
47	26
48	45
49	32
50	60
51	36
52	49
53	32
54	27
55	10
56	12
57	36
58	39
59	60
60	40
61	72
62	42
63	56
64	36
65	30
66	11
67	28
68	24
69	54
70	52
71	75
72	48
73	84
74	48
75	63
76	40
77	33
78	12

[1, 3, 2, 4, 6, 3, 7, 8, 9, 4, 6, 14, 12, 12, 5, 12, 12, 21, 16, 15, 6, 8, 24, 18, 28, 20, 18, 7, 15, 16, 36, 24, 35, 24, 21, 8, 13, 30, 24, 48, 30, 42, 28, 24, 9, 18, 26, 45, 32, 60, 36, 49, 32, 27, 10, 12, 36, 39, 60, 40, 72, 42, 56, 36, 30, 11, 28, 24, 54, 52, 75, 48, 84, 48, 63, 40, 33, 12]

cp's OEIS Frontend

A319073 Square array read by antidiagonals upwards: T(n,k) = k*sigma(n), n >= 1, k >= 1.

Table of values

List of values

n	a(n)
1	1
2	3
3	2
4	4
5	6
6	3
7	7
8	8
9	9
10	4
11	6
12	14
13	12
14	12
15	5
16	12
17	12
18	21
19	16
20	15
21	6
22	8
23	24
24	18
25	28
26	20
27	18
28	7
29	15
30	16
31	36
32	24
33	35
34	24
35	21
36	8
37	13
38	30
39	24
40	48
41	30
42	42
43	28
44	24
45	9
46	18
47	26
48	45
49	32
50	60
51	36
52	49
53	32
54	27
55	10
56	12
57	36
58	39
59	60
60	40
61	72
62	42
63	56
64	36
65	30
66	11
67	28
68	24
69	54
70	52
71	75
72	48
73	84
74	48
75	63
76	40
77	33
78	12

n	a(n)
1	1
2	3
3	2
4	4
5	6
6	3
7	7
8	8
9	9
10	4
11	6
12	14
13	12
14	12
15	5
16	12
17	12
18	21
19	16
20	15
21	6
22	8
23	24
24	18
25	28
26	20
27	18
28	7
29	15
30	16
31	36
32	24
33	35
34	24
35	21
36	8
37	13
38	30
39	24
40	48
41	30
42	42
43	28
44	24
45	9
46	18
47	26
48	45
49	32
50	60
51	36
52	49
53	32
54	27
55	10
56	12
57	36
58	39
59	60
60	40
61	72
62	42
63	56
64	36
65	30
66	11
67	28
68	24
69	54
70	52
71	75
72	48
73	84
74	48
75	63
76	40
77	33
78	12

n	a(n)
1	1
2	3
3	2
4	4
5	6
6	3
7	7
8	8
9	9
10	4
11	6
12	14
13	12
14	12
15	5
16	12
17	12
18	21
19	16
20	15
21	6
22	8
23	24
24	18
25	28
26	20
27	18
28	7
29	15
30	16
31	36
32	24
33	35
34	24
35	21
36	8
37	13
38	30
39	24
40	48
41	30
42	42
43	28
44	24
45	9
46	18
47	26
48	45
49	32
50	60
51	36
52	49
53	32
54	27
55	10
56	12
57	36
58	39
59	60
60	40
61	72
62	42
63	56
64	36
65	30
66	11
67	28
68	24
69	54
70	52
71	75
72	48
73	84
74	48
75	63
76	40
77	33
78	12