A176331 - cp's OEIS frontend

A176331 Triangle read by rows: T(n, k) = Sum_{j=0..n} C(j, n-k) * C(j, k) * (-1)^(n - j).

n	a(n)
0	1
1	1
2	1
3	1
4	3
5	1
6	1
7	7
8	7
9	1
10	1
11	13
12	28
13	13
14	1
15	1
16	21
17	79
18	79
19	21
20	1
21	1
22	31
23	181
24	315
25	181
26	31
27	1
28	1
29	43
30	361
31	971
32	971
33	361
34	43
35	1
36	1
37	57
38	652
39	2511
40	3876
41	2511
42	652
43	57
44	1
45	1
46	73
47	1093
48	5713
49	12606
50	12606
51	5713
52	1093
53	73
54	1
55	1
56	91
57	1729
58	11789
59	35246
60	50358
61	35246
62	11789
63	1729
64	91
65	1

[1, 1, 1, 1, 3, 1, 1, 7, 7, 1, 1, 13, 28, 13, 1, 1, 21, 79, 79, 21, 1, 1, 31, 181, 315, 181, 31, 1, 1, 43, 361, 971, 971, 361, 43, 1, 1, 57, 652, 2511, 3876, 2511, 652, 57, 1, 1, 73, 1093, 5713, 12606, 12606, 5713, 1093, 73, 1, 1, 91, 1729, 11789, 35246, 50358, 35246, 11789, 1729, 91, 1]

cp's OEIS Frontend

A176331 Triangle read by rows: T(n, k) = Sum_{j=0..n} C(j, n-k) * C(j, k) * (-1)^(n - j).

Table of values

List of values