A242639 - cp's OEIS frontend

A242639 Array read by antidiagonals upwards: A(s,n) (s>=1, n >= 1) = Sum_{d|n, d <= s} d^2 + s*Sum_{d|n, d>s} d.

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

[1, 1, 3, 1, 5, 4, 1, 5, 7, 7, 1, 5, 10, 13, 6, 1, 5, 10, 17, 11, 12, 1, 5, 10, 21, 16, 23, 8, 1, 5, 10, 21, 21, 32, 15, 15, 1, 5, 10, 21, 26, 38, 22, 29, 13, 1, 5, 10, 21, 26, 44, 29, 41, 25, 18, 1, 5, 10, 21, 26, 50, 36, 53, 37, 35, 12, 1, 5, 10, 21, 26, 50, 43, 61, 46, 50, 23, 28]

cp's OEIS Frontend

A242639 Array read by antidiagonals upwards: A(s,n) (s>=1, n >= 1) = Sum_{d|n, d <= s} d^2 + s*Sum_{d|n, d>s} d.

Table of values

List of values

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

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

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