A305720 - cp's OEIS frontend

A305720 Square array T(n, k) read by antidiagonals, n > 0 and k > 0; for any prime number p, the p-adic valuation of T(n, k) is the product of the p-adic valuations of n and of k.

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

[1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 4, 3, 4, 1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 16, 1, 2, 1, 1, 1, 3, 1, 1, 3, 1, 1, 1, 8, 1, 4, 5, 4, 1, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 9, 64, 1, 6, 1, 64, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 4, 1, 4, 1, 8, 7, 8]

cp's OEIS Frontend

A305720 Square array T(n, k) read by antidiagonals, n > 0 and k > 0; for any prime number p, the p-adic valuation of T(n, k) is the product of the p-adic valuations of n and of k.

Table of values

List of values

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

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

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