A259097 - cp's OEIS frontend

A259097 Triangle read by rows: T(n,r) = binomial(n,r)binomial(2n-3r-4,n-2r-2)/(n-r-1), n >= 2, r = 0..floor(n/2)-1.

n	a(n)
2	1
3	1
4	2
5	2
6	5
7	5
8	14
9	15
10	5
11	42
12	49
13	21
14	132
15	168
16	84
17	14
18	429
19	594
20	336
21	84
22	1430
23	2145
24	1350
25	420
26	42
27	4862
28	7865
29	5445
30	1980
31	330
32	16796
33	29172
34	22022
35	9075
36	1980
37	132
38	58786
39	109174
40	89232
41	40898
42	10725
43	1287
44	208012
45	411502
46	361998
47	182182
48	55055
49	9009
50	429
51	742900
52	1560090
53	1469650
54	804440
55	273273
56	55055
57	5005

[1, 1, 2, 2, 5, 5, 14, 15, 5, 42, 49, 21, 132, 168, 84, 14, 429, 594, 336, 84, 1430, 2145, 1350, 420, 42, 4862, 7865, 5445, 1980, 330, 16796, 29172, 22022, 9075, 1980, 132, 58786, 109174, 89232, 40898, 10725, 1287, 208012, 411502, 361998, 182182, 55055, 9009, 429, 742900, 1560090, 1469650, 804440, 273273, 55055, 5005]

cp's OEIS Frontend

A259097 Triangle read by rows: T(n,r) = binomial(n,r)binomial(2n-3r-4,n-2r-2)/(n-r-1), n >= 2, r = 0..floor(n/2)-1.

Table of values

List of values

cp's OEIS Frontend

A259097 Triangle read by rows: T(n,r) = binomial(n,r)*binomial(2*n-3*r-4,n-2*r-2)/(n-r-1), n >= 2, r = 0..floor(n/2)-1.

Table of values

List of values

A259097 Triangle read by rows: T(n,r) = binomial(n,r)binomial(2n-3r-4,n-2r-2)/(n-r-1), n >= 2, r = 0..floor(n/2)-1.