A319526 - cp's OEIS frontend

A319526 Square array read by antidiagonals upwards: T(n,k) = sigma(n*k), n >= 1, k >= 1.

n	a(n)
1	1
2	3
3	3
4	4
5	7
6	4
7	7
8	12
9	12
10	7
11	6
12	15
13	13
14	15
15	6
16	12
17	18
18	28
19	28
20	18
21	12
22	8
23	28
24	24
25	31
26	24
27	28
28	8
29	15
30	24
31	39
32	42
33	42
34	39
35	24
36	15
37	13
38	31
39	32
40	60
41	31
42	60
43	32
44	31
45	13
46	18
47	39
48	60
49	56
50	72
51	72
52	56
53	60
54	39
55	18
56	12
57	42
58	40
59	63
60	48
61	91
62	48
63	63
64	40
65	42
66	12
67	28
68	36
69	72
70	91
71	90
72	96
73	96
74	90
75	91
76	72
77	36
78	28

[1, 3, 3, 4, 7, 4, 7, 12, 12, 7, 6, 15, 13, 15, 6, 12, 18, 28, 28, 18, 12, 8, 28, 24, 31, 24, 28, 8, 15, 24, 39, 42, 42, 39, 24, 15, 13, 31, 32, 60, 31, 60, 32, 31, 13, 18, 39, 60, 56, 72, 72, 56, 60, 39, 18, 12, 42, 40, 63, 48, 91, 48, 63, 40, 42, 12, 28, 36, 72, 91, 90, 96, 96, 90, 91, 72, 36, 28]

cp's OEIS Frontend

A319526 Square array read by antidiagonals upwards: T(n,k) = sigma(n*k), n >= 1, k >= 1.

Table of values

List of values

n	a(n)
1	1
2	3
3	3
4	4
5	7
6	4
7	7
8	12
9	12
10	7
11	6
12	15
13	13
14	15
15	6
16	12
17	18
18	28
19	28
20	18
21	12
22	8
23	28
24	24
25	31
26	24
27	28
28	8
29	15
30	24
31	39
32	42
33	42
34	39
35	24
36	15
37	13
38	31
39	32
40	60
41	31
42	60
43	32
44	31
45	13
46	18
47	39
48	60
49	56
50	72
51	72
52	56
53	60
54	39
55	18
56	12
57	42
58	40
59	63
60	48
61	91
62	48
63	63
64	40
65	42
66	12
67	28
68	36
69	72
70	91
71	90
72	96
73	96
74	90
75	91
76	72
77	36
78	28

n	a(n)
1	1
2	3
3	3
4	4
5	7
6	4
7	7
8	12
9	12
10	7
11	6
12	15
13	13
14	15
15	6
16	12
17	18
18	28
19	28
20	18
21	12
22	8
23	28
24	24
25	31
26	24
27	28
28	8
29	15
30	24
31	39
32	42
33	42
34	39
35	24
36	15
37	13
38	31
39	32
40	60
41	31
42	60
43	32
44	31
45	13
46	18
47	39
48	60
49	56
50	72
51	72
52	56
53	60
54	39
55	18
56	12
57	42
58	40
59	63
60	48
61	91
62	48
63	63
64	40
65	42
66	12
67	28
68	36
69	72
70	91
71	90
72	96
73	96
74	90
75	91
76	72
77	36
78	28

n	a(n)
1	1
2	3
3	3
4	4
5	7
6	4
7	7
8	12
9	12
10	7
11	6
12	15
13	13
14	15
15	6
16	12
17	18
18	28
19	28
20	18
21	12
22	8
23	28
24	24
25	31
26	24
27	28
28	8
29	15
30	24
31	39
32	42
33	42
34	39
35	24
36	15
37	13
38	31
39	32
40	60
41	31
42	60
43	32
44	31
45	13
46	18
47	39
48	60
49	56
50	72
51	72
52	56
53	60
54	39
55	18
56	12
57	42
58	40
59	63
60	48
61	91
62	48
63	63
64	40
65	42
66	12
67	28
68	36
69	72
70	91
71	90
72	96
73	96
74	90
75	91
76	72
77	36
78	28