A274824 - cp's OEIS frontend

A274824 Triangle read by rows: T(n,k) = (n-k+1)*sigma(k), n>=1, 1<=k<=n.

n	a(n)
1	1
2	2
3	3
4	3
5	6
6	4
7	4
8	9
9	8
10	7
11	5
12	12
13	12
14	14
15	6
16	6
17	15
18	16
19	21
20	12
21	12
22	7
23	18
24	20
25	28
26	18
27	24
28	8
29	8
30	21
31	24
32	35
33	24
34	36
35	16
36	15
37	9
38	24
39	28
40	42
41	30
42	48
43	24
44	30
45	13
46	10
47	27
48	32
49	49
50	36
51	60
52	32
53	45
54	26
55	18
56	11
57	30
58	36
59	56
60	42
61	72
62	40
63	60
64	39
65	36
66	12
67	12
68	33
69	40
70	63
71	48
72	84
73	48
74	75
75	52
76	54
77	24
78	28
79	13
80	36
81	44
82	70
83	54
84	96
85	56
86	90
87	65
88	72
89	36
90	56
91	14

[1, 2, 3, 3, 6, 4, 4, 9, 8, 7, 5, 12, 12, 14, 6, 6, 15, 16, 21, 12, 12, 7, 18, 20, 28, 18, 24, 8, 8, 21, 24, 35, 24, 36, 16, 15, 9, 24, 28, 42, 30, 48, 24, 30, 13, 10, 27, 32, 49, 36, 60, 32, 45, 26, 18, 11, 30, 36, 56, 42, 72, 40, 60, 39, 36, 12, 12, 33, 40, 63, 48, 84, 48, 75, 52, 54, 24, 28, 13, 36, 44, 70, 54, 96, 56, 90, 65, 72, 36, 56, 14]

cp's OEIS Frontend

A274824 Triangle read by rows: T(n,k) = (n-k+1)*sigma(k), n>=1, 1<=k<=n.

Table of values

List of values

n	a(n)
1	1
2	2
3	3
4	3
5	6
6	4
7	4
8	9
9	8
10	7
11	5
12	12
13	12
14	14
15	6
16	6
17	15
18	16
19	21
20	12
21	12
22	7
23	18
24	20
25	28
26	18
27	24
28	8
29	8
30	21
31	24
32	35
33	24
34	36
35	16
36	15
37	9
38	24
39	28
40	42
41	30
42	48
43	24
44	30
45	13
46	10
47	27
48	32
49	49
50	36
51	60
52	32
53	45
54	26
55	18
56	11
57	30
58	36
59	56
60	42
61	72
62	40
63	60
64	39
65	36
66	12
67	12
68	33
69	40
70	63
71	48
72	84
73	48
74	75
75	52
76	54
77	24
78	28
79	13
80	36
81	44
82	70
83	54
84	96
85	56
86	90
87	65
88	72
89	36
90	56
91	14

n	a(n)
1	1
2	2
3	3
4	3
5	6
6	4
7	4
8	9
9	8
10	7
11	5
12	12
13	12
14	14
15	6
16	6
17	15
18	16
19	21
20	12
21	12
22	7
23	18
24	20
25	28
26	18
27	24
28	8
29	8
30	21
31	24
32	35
33	24
34	36
35	16
36	15
37	9
38	24
39	28
40	42
41	30
42	48
43	24
44	30
45	13
46	10
47	27
48	32
49	49
50	36
51	60
52	32
53	45
54	26
55	18
56	11
57	30
58	36
59	56
60	42
61	72
62	40
63	60
64	39
65	36
66	12
67	12
68	33
69	40
70	63
71	48
72	84
73	48
74	75
75	52
76	54
77	24
78	28
79	13
80	36
81	44
82	70
83	54
84	96
85	56
86	90
87	65
88	72
89	36
90	56
91	14

n	a(n)
1	1
2	2
3	3
4	3
5	6
6	4
7	4
8	9
9	8
10	7
11	5
12	12
13	12
14	14
15	6
16	6
17	15
18	16
19	21
20	12
21	12
22	7
23	18
24	20
25	28
26	18
27	24
28	8
29	8
30	21
31	24
32	35
33	24
34	36
35	16
36	15
37	9
38	24
39	28
40	42
41	30
42	48
43	24
44	30
45	13
46	10
47	27
48	32
49	49
50	36
51	60
52	32
53	45
54	26
55	18
56	11
57	30
58	36
59	56
60	42
61	72
62	40
63	60
64	39
65	36
66	12
67	12
68	33
69	40
70	63
71	48
72	84
73	48
74	75
75	52
76	54
77	24
78	28
79	13
80	36
81	44
82	70
83	54
84	96
85	56
86	90
87	65
88	72
89	36
90	56
91	14