A385850 - cp's OEIS frontend

A385850 Triangle read by rows: T(n,k) = denominator((Sum_{i=1..k} (n-i+1)^2)/(Sum_{i=1..k} i^2)), with 1 <= k <= n.

n	a(n)
1	1
2	1
3	1
4	1
5	5
6	1
7	1
8	1
9	14
10	1
11	1
12	5
13	7
14	5
15	1
16	1
17	5
18	2
19	15
20	11
21	1
22	1
23	1
24	7
25	5
26	11
27	91
28	1
29	1
30	5
31	14
32	5
33	11
34	91
35	20
36	1
37	1
38	1
39	7
40	3
41	11
42	91
43	1
44	51
45	1
46	1
47	5
48	2
49	5
50	1
51	91
52	20
53	51
54	95
55	1
56	1
57	5
58	7
59	5
60	11
61	91
62	5
63	17
64	95
65	77
66	1
67	1
68	1
69	14
70	15
71	11
72	7
73	4
74	51
75	95
76	77
77	46
78	1

[1, 1, 1, 1, 5, 1, 1, 1, 14, 1, 1, 5, 7, 5, 1, 1, 5, 2, 15, 11, 1, 1, 1, 7, 5, 11, 91, 1, 1, 5, 14, 5, 11, 91, 20, 1, 1, 1, 7, 3, 11, 91, 1, 51, 1, 1, 5, 2, 5, 1, 91, 20, 51, 95, 1, 1, 5, 7, 5, 11, 91, 5, 17, 95, 77, 1, 1, 1, 14, 15, 11, 7, 4, 51, 95, 77, 46, 1]

cp's OEIS Frontend

A385850 Triangle read by rows: T(n,k) = denominator((Sum_{i=1..k} (n-i+1)^2)/(Sum_{i=1..k} i^2)), with 1 <= k <= n.

Table of values

List of values

n	a(n)
1	1
2	1
3	1
4	1
5	5
6	1
7	1
8	1
9	14
10	1
11	1
12	5
13	7
14	5
15	1
16	1
17	5
18	2
19	15
20	11
21	1
22	1
23	1
24	7
25	5
26	11
27	91
28	1
29	1
30	5
31	14
32	5
33	11
34	91
35	20
36	1
37	1
38	1
39	7
40	3
41	11
42	91
43	1
44	51
45	1
46	1
47	5
48	2
49	5
50	1
51	91
52	20
53	51
54	95
55	1
56	1
57	5
58	7
59	5
60	11
61	91
62	5
63	17
64	95
65	77
66	1
67	1
68	1
69	14
70	15
71	11
72	7
73	4
74	51
75	95
76	77
77	46
78	1

n	a(n)
1	1
2	1
3	1
4	1
5	5
6	1
7	1
8	1
9	14
10	1
11	1
12	5
13	7
14	5
15	1
16	1
17	5
18	2
19	15
20	11
21	1
22	1
23	1
24	7
25	5
26	11
27	91
28	1
29	1
30	5
31	14
32	5
33	11
34	91
35	20
36	1
37	1
38	1
39	7
40	3
41	11
42	91
43	1
44	51
45	1
46	1
47	5
48	2
49	5
50	1
51	91
52	20
53	51
54	95
55	1
56	1
57	5
58	7
59	5
60	11
61	91
62	5
63	17
64	95
65	77
66	1
67	1
68	1
69	14
70	15
71	11
72	7
73	4
74	51
75	95
76	77
77	46
78	1

n	a(n)
1	1
2	1
3	1
4	1
5	5
6	1
7	1
8	1
9	14
10	1
11	1
12	5
13	7
14	5
15	1
16	1
17	5
18	2
19	15
20	11
21	1
22	1
23	1
24	7
25	5
26	11
27	91
28	1
29	1
30	5
31	14
32	5
33	11
34	91
35	20
36	1
37	1
38	1
39	7
40	3
41	11
42	91
43	1
44	51
45	1
46	1
47	5
48	2
49	5
50	1
51	91
52	20
53	51
54	95
55	1
56	1
57	5
58	7
59	5
60	11
61	91
62	5
63	17
64	95
65	77
66	1
67	1
68	1
69	14
70	15
71	11
72	7
73	4
74	51
75	95
76	77
77	46
78	1