A273263 - cp's OEIS frontend

A273263 Irregular triangle read by rows: T(n,k) is the sum of the elements of the k-th column of the difference table of the divisors of n.

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

[1, 2, 2, 3, 3, 3, 4, 4, 5, 5, 4, 5, 6, 6, 7, 7, 4, 6, 8, 8, 7, 9, 9, 4, 7, 10, 10, 11, 11, 4, 6, 8, 10, 12, 12, 13, 13, 4, 9, 14, 14, 11, 13, 15, 15, 5, 8, 12, 16, 16, 17, 17, 12, 11, 12, 15, 18, 18, 19, 19, -3, 4, 10, 15, 20, 20, 13, 17, 21, 21, 4, 13, 22, 22, 23, 23, -4, 3, 8, 12, 16, 20, 24, 24, 21, 25, 25]

cp's OEIS Frontend

A273263 Irregular triangle read by rows: T(n,k) is the sum of the elements of the k-th column of the difference table of the divisors of n.

Table of values

List of values

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

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

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