A171661 - cp's OEIS frontend

A171661 Triangle T(n,k) (n >= 0, 0 <= k <= n) read by rows: T(n,0) = T(n,1) = A000984(n); for n >= 2 and k >= 2, T(n,k) = T(n,k-1) - T(n-1,k-2).

n	a(n)
0	1
1	2
2	2
3	6
4	6
5	4
6	20
7	20
8	14
9	8
10	70
11	70
12	50
13	30
14	16
15	252
16	252
17	182
18	112
19	62
20	32
21	924
22	924
23	672
24	420
25	238
26	126
27	64
28	3432
29	3432
30	2508
31	1584
32	912
33	492
34	254
35	128
36	12870
37	12870
38	9438
39	6006
40	3498
41	1914
42	1002
43	510
44	256
45	48620
46	48620
47	35750
48	22880
49	13442
50	7436

[1, 2, 2, 6, 6, 4, 20, 20, 14, 8, 70, 70, 50, 30, 16, 252, 252, 182, 112, 62, 32, 924, 924, 672, 420, 238, 126, 64, 3432, 3432, 2508, 1584, 912, 492, 254, 128, 12870, 12870, 9438, 6006, 3498, 1914, 1002, 510, 256, 48620, 48620, 35750, 22880, 13442, 7436]

cp's OEIS Frontend

A171661 Triangle T(n,k) (n >= 0, 0 <= k <= n) read by rows: T(n,0) = T(n,1) = A000984(n); for n >= 2 and k >= 2, T(n,k) = T(n,k-1) - T(n-1,k-2).

Table of values

List of values