A273261 - cp's OEIS frontend

A273261 Irregular triangle read by rows: T(n,k) = sum of the elements of the k-th row of the difference table of the divisors of n.

n	a(n)
1	1
2	3
3	1
4	4
5	2
6	7
7	3
8	1
9	6
10	4
11	12
12	5
13	2
14	2
15	8
16	6
17	15
18	7
19	3
20	1
21	13
22	8
23	4
24	18
25	9
26	4
27	0
28	12
29	10
30	28
31	11
32	5
33	4
34	3
35	1
36	14
37	12
38	24
39	13
40	6
41	-2
42	24
43	14
44	8
45	8
46	31
47	15
48	7
49	3
50	1
51	18
52	16
53	39
54	17
55	8
56	6
57	4
58	12
59	20
60	18
61	42
62	19
63	9
64	4
65	3
66	-11
67	32
68	20
69	12
70	8
71	36
72	21
73	10
74	-6
75	24
76	22
77	60
78	23
79	11
80	8
81	6
82	3
83	4
84	-12
85	31
86	24
87	16
88	42
89	25
90	12
91	-8

[1, 3, 1, 4, 2, 7, 3, 1, 6, 4, 12, 5, 2, 2, 8, 6, 15, 7, 3, 1, 13, 8, 4, 18, 9, 4, 0, 12, 10, 28, 11, 5, 4, 3, 1, 14, 12, 24, 13, 6, -2, 24, 14, 8, 8, 31, 15, 7, 3, 1, 18, 16, 39, 17, 8, 6, 4, 12, 20, 18, 42, 19, 9, 4, 3, -11, 32, 20, 12, 8, 36, 21, 10, -6, 24, 22, 60, 23, 11, 8, 6, 3, 4, -12, 31, 24, 16, 42, 25, 12, -8]

cp's OEIS Frontend

A273261 Irregular triangle read by rows: T(n,k) = sum of the elements of the k-th row of the difference table of the divisors of n.

Table of values

List of values

n	a(n)
1	1
2	3
3	1
4	4
5	2
6	7
7	3
8	1
9	6
10	4
11	12
12	5
13	2
14	2
15	8
16	6
17	15
18	7
19	3
20	1
21	13
22	8
23	4
24	18
25	9
26	4
27	0
28	12
29	10
30	28
31	11
32	5
33	4
34	3
35	1
36	14
37	12
38	24
39	13
40	6
41	-2
42	24
43	14
44	8
45	8
46	31
47	15
48	7
49	3
50	1
51	18
52	16
53	39
54	17
55	8
56	6
57	4
58	12
59	20
60	18
61	42
62	19
63	9
64	4
65	3
66	-11
67	32
68	20
69	12
70	8
71	36
72	21
73	10
74	-6
75	24
76	22
77	60
78	23
79	11
80	8
81	6
82	3
83	4
84	-12
85	31
86	24
87	16
88	42
89	25
90	12
91	-8

n	a(n)
1	1
2	3
3	1
4	4
5	2
6	7
7	3
8	1
9	6
10	4
11	12
12	5
13	2
14	2
15	8
16	6
17	15
18	7
19	3
20	1
21	13
22	8
23	4
24	18
25	9
26	4
27	0
28	12
29	10
30	28
31	11
32	5
33	4
34	3
35	1
36	14
37	12
38	24
39	13
40	6
41	-2
42	24
43	14
44	8
45	8
46	31
47	15
48	7
49	3
50	1
51	18
52	16
53	39
54	17
55	8
56	6
57	4
58	12
59	20
60	18
61	42
62	19
63	9
64	4
65	3
66	-11
67	32
68	20
69	12
70	8
71	36
72	21
73	10
74	-6
75	24
76	22
77	60
78	23
79	11
80	8
81	6
82	3
83	4
84	-12
85	31
86	24
87	16
88	42
89	25
90	12
91	-8

n	a(n)
1	1
2	3
3	1
4	4
5	2
6	7
7	3
8	1
9	6
10	4
11	12
12	5
13	2
14	2
15	8
16	6
17	15
18	7
19	3
20	1
21	13
22	8
23	4
24	18
25	9
26	4
27	0
28	12
29	10
30	28
31	11
32	5
33	4
34	3
35	1
36	14
37	12
38	24
39	13
40	6
41	-2
42	24
43	14
44	8
45	8
46	31
47	15
48	7
49	3
50	1
51	18
52	16
53	39
54	17
55	8
56	6
57	4
58	12
59	20
60	18
61	42
62	19
63	9
64	4
65	3
66	-11
67	32
68	20
69	12
70	8
71	36
72	21
73	10
74	-6
75	24
76	22
77	60
78	23
79	11
80	8
81	6
82	3
83	4
84	-12
85	31
86	24
87	16
88	42
89	25
90	12
91	-8