A320973 - cp's OEIS frontend

A320973 Square array A(n,k), n >= 1, k >= 0, read by antidiagonals: A(n,k) = n^k * Product_{p|n, p prime} (1 + 1/p^k).

n	a(n)
1	1
2	1
3	2
4	1
5	3
6	2
7	1
8	5
9	4
10	2
11	1
12	9
13	10
14	6
15	2
16	1
17	17
18	28
19	20
20	6
21	4
22	1
23	33
24	82
25	72
26	26
27	12
28	2
29	1
30	65
31	244
32	272
33	126
34	50
35	8
36	2
37	1
38	129
39	730
40	1056
41	626
42	252
43	50
44	12
45	2
46	1
47	257
48	2188
49	4160
50	3126
51	1394
52	344
53	80
54	12
55	4
56	1
57	513
58	6562
59	16512
60	15626
61	8052
62	2402
63	576
64	90
65	18
66	2

[1, 1, 2, 1, 3, 2, 1, 5, 4, 2, 1, 9, 10, 6, 2, 1, 17, 28, 20, 6, 4, 1, 33, 82, 72, 26, 12, 2, 1, 65, 244, 272, 126, 50, 8, 2, 1, 129, 730, 1056, 626, 252, 50, 12, 2, 1, 257, 2188, 4160, 3126, 1394, 344, 80, 12, 4, 1, 513, 6562, 16512, 15626, 8052, 2402, 576, 90, 18, 2]

cp's OEIS Frontend

A320973 Square array A(n,k), n >= 1, k >= 0, read by antidiagonals: A(n,k) = n^k * Product_{p|n, p prime} (1 + 1/p^k).

Table of values

List of values