A307668 - cp's OEIS frontend

A307668 A(n,k) = Sum_{j=0..floor(n/k)} (-1)^jbinomial(2n,k*j+n), square array A(n,k) read by antidiagonals, for n >= 0, k >= 1.

n	a(n)
0	1
1	1
2	1
3	1
4	2
5	3
6	1
7	2
8	5
9	10
10	1
11	2
12	6
13	14
14	35
15	1
16	2
17	6
18	19
19	43
20	126
21	1
22	2
23	6
24	20
25	62
26	142
27	462
28	1
29	2
30	6
31	20
32	69
33	207
34	494
35	1716
36	1
37	2
38	6
39	20
40	70
41	242
42	705
43	1780
44	6435
45	1
46	2
47	6
48	20
49	70
50	251
51	858
52	2445
53	6563
54	24310
55	1
56	2
57	6
58	20
59	70
60	252
61	912
62	3068
63	8622
64	24566
65	92378

[1, 1, 1, 1, 2, 3, 1, 2, 5, 10, 1, 2, 6, 14, 35, 1, 2, 6, 19, 43, 126, 1, 2, 6, 20, 62, 142, 462, 1, 2, 6, 20, 69, 207, 494, 1716, 1, 2, 6, 20, 70, 242, 705, 1780, 6435, 1, 2, 6, 20, 70, 251, 858, 2445, 6563, 24310, 1, 2, 6, 20, 70, 252, 912, 3068, 8622, 24566, 92378]

cp's OEIS Frontend

A307668 A(n,k) = Sum_{j=0..floor(n/k)} (-1)^jbinomial(2n,k*j+n), square array A(n,k) read by antidiagonals, for n >= 0, k >= 1.

Table of values

List of values

cp's OEIS Frontend

A307668 A(n,k) = Sum_{j=0..floor(n/k)} (-1)^j*binomial(2*n,k*j+n), square array A(n,k) read by antidiagonals, for n >= 0, k >= 1.

Table of values

List of values

A307668 A(n,k) = Sum_{j=0..floor(n/k)} (-1)^jbinomial(2n,k*j+n), square array A(n,k) read by antidiagonals, for n >= 0, k >= 1.