A385849 - cp's OEIS frontend

A385849 Triangle read by rows: T(n,k) = numerator((Sum_{i=1..k} (n-i+1)^2)/(Sum_{i=1..k} i^2)), with 1 <= k <= n.

n	a(n)
1	1
2	4
3	1
4	9
5	13
6	1
7	16
8	5
9	29
10	1
11	25
12	41
13	25
14	9
15	1
16	36
17	61
18	11
19	43
20	18
21	1
22	49
23	17
24	55
25	21
26	27
27	139
28	1
29	64
30	113
31	149
32	29
33	38
34	199
35	29
36	1
37	81
38	29
39	97
40	23
41	51
42	271
43	2
44	71
45	1
46	100
47	181
48	35
49	49
50	6
51	355
52	53
53	95
54	128
55	1
56	121
57	221
58	151
59	61
60	83
61	451
62	17
63	41
64	167
65	101
66	1

[1, 4, 1, 9, 13, 1, 16, 5, 29, 1, 25, 41, 25, 9, 1, 36, 61, 11, 43, 18, 1, 49, 17, 55, 21, 27, 139, 1, 64, 113, 149, 29, 38, 199, 29, 1, 81, 29, 97, 23, 51, 271, 2, 71, 1, 100, 181, 35, 49, 6, 355, 53, 95, 128, 1, 121, 221, 151, 61, 83, 451, 17, 41, 167, 101, 1]

cp's OEIS Frontend

A385849 Triangle read by rows: T(n,k) = numerator((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	4
3	1
4	9
5	13
6	1
7	16
8	5
9	29
10	1
11	25
12	41
13	25
14	9
15	1
16	36
17	61
18	11
19	43
20	18
21	1
22	49
23	17
24	55
25	21
26	27
27	139
28	1
29	64
30	113
31	149
32	29
33	38
34	199
35	29
36	1
37	81
38	29
39	97
40	23
41	51
42	271
43	2
44	71
45	1
46	100
47	181
48	35
49	49
50	6
51	355
52	53
53	95
54	128
55	1
56	121
57	221
58	151
59	61
60	83
61	451
62	17
63	41
64	167
65	101
66	1

n	a(n)
1	1
2	4
3	1
4	9
5	13
6	1
7	16
8	5
9	29
10	1
11	25
12	41
13	25
14	9
15	1
16	36
17	61
18	11
19	43
20	18
21	1
22	49
23	17
24	55
25	21
26	27
27	139
28	1
29	64
30	113
31	149
32	29
33	38
34	199
35	29
36	1
37	81
38	29
39	97
40	23
41	51
42	271
43	2
44	71
45	1
46	100
47	181
48	35
49	49
50	6
51	355
52	53
53	95
54	128
55	1
56	121
57	221
58	151
59	61
60	83
61	451
62	17
63	41
64	167
65	101
66	1

n	a(n)
1	1
2	4
3	1
4	9
5	13
6	1
7	16
8	5
9	29
10	1
11	25
12	41
13	25
14	9
15	1
16	36
17	61
18	11
19	43
20	18
21	1
22	49
23	17
24	55
25	21
26	27
27	139
28	1
29	64
30	113
31	149
32	29
33	38
34	199
35	29
36	1
37	81
38	29
39	97
40	23
41	51
42	271
43	2
44	71
45	1
46	100
47	181
48	35
49	49
50	6
51	355
52	53
53	95
54	128
55	1
56	121
57	221
58	151
59	61
60	83
61	451
62	17
63	41
64	167
65	101
66	1