A144389 - cp's OEIS frontend

A144389 Triangle T(n,k) = nbinomial(n - 1, k) - (-1)^(n - k)binomial(n, k), T(0,0) = 1, read by rows, 0 <= k <= n.

n	a(n)
0	-1
1	2
2	-1
3	1
4	4
5	-1
6	4
7	3
8	6
9	-1
10	3
11	16
12	6
13	8
14	-1
15	6
16	15
17	40
18	10
19	10
20	-1
21	5
22	36
23	45
24	80
25	15
26	12
27	-1
28	8
29	35
30	126
31	105
32	140
33	21
34	14
35	-1
36	7
37	64
38	140
39	336
40	210
41	224
42	28
43	16
44	-1
45	10
46	63
47	288
48	420
49	756
50	378
51	336
52	36
53	18
54	-1
55	9
56	100
57	315
58	960
59	1050
60	1512
61	630
62	480
63	45
64	20
65	-1

[-1, 2, -1, 1, 4, -1, 4, 3, 6, -1, 3, 16, 6, 8, -1, 6, 15, 40, 10, 10, -1, 5, 36, 45, 80, 15, 12, -1, 8, 35, 126, 105, 140, 21, 14, -1, 7, 64, 140, 336, 210, 224, 28, 16, -1, 10, 63, 288, 420, 756, 378, 336, 36, 18, -1, 9, 100, 315, 960, 1050, 1512, 630, 480, 45, 20, -1]

cp's OEIS Frontend

A144389 Triangle T(n,k) = nbinomial(n - 1, k) - (-1)^(n - k)binomial(n, k), T(0,0) = 1, read by rows, 0 <= k <= n.

Table of values

List of values

cp's OEIS Frontend

A144389 Triangle T(n,k) = n*binomial(n - 1, k) - (-1)^(n - k)*binomial(n, k), T(0,0) = 1, read by rows, 0 <= k <= n.

Table of values

List of values

A144389 Triangle T(n,k) = nbinomial(n - 1, k) - (-1)^(n - k)binomial(n, k), T(0,0) = 1, read by rows, 0 <= k <= n.