A174345 - cp's OEIS frontend

A174345 Triangle T(n, k) = (1/k)binomial(n-1, k-1)binomial(n, k-1)2^(k-1) if floor(n/2) >= k, otherwise (1/k)binomial(n-1, k-1)binomial(n, k-1)2^(n-k), read by rows.

n	a(n)
1	1
2	1
3	1
4	1
5	6
6	1
7	1
8	12
9	12
10	1
11	1
12	20
13	80
14	20
15	1
16	1
17	30
18	200
19	200
20	30
21	1
22	1
23	42
24	420
25	1400
26	420
27	42
28	1
29	1
30	56
31	784
32	3920
33	3920
34	784
35	56
36	1
37	1
38	72
39	1344
40	9408
41	28224
42	9408
43	1344
44	72
45	1
46	1
47	90
48	2160
49	20160
50	84672
51	84672
52	20160
53	2160
54	90
55	1

[1, 1, 1, 1, 6, 1, 1, 12, 12, 1, 1, 20, 80, 20, 1, 1, 30, 200, 200, 30, 1, 1, 42, 420, 1400, 420, 42, 1, 1, 56, 784, 3920, 3920, 784, 56, 1, 1, 72, 1344, 9408, 28224, 9408, 1344, 72, 1, 1, 90, 2160, 20160, 84672, 84672, 20160, 2160, 90, 1]

cp's OEIS Frontend

A174345 Triangle T(n, k) = (1/k)binomial(n-1, k-1)binomial(n, k-1)2^(k-1) if floor(n/2) >= k, otherwise (1/k)binomial(n-1, k-1)binomial(n, k-1)2^(n-k), read by rows.

Table of values

List of values

cp's OEIS Frontend

A174345 Triangle T(n, k) = (1/k)*binomial(n-1, k-1)*binomial(n, k-1)*2^(k-1) if floor(n/2) >= k, otherwise (1/k)*binomial(n-1, k-1)*binomial(n, k-1)*2^(n-k), read by rows.

Table of values

List of values

A174345 Triangle T(n, k) = (1/k)binomial(n-1, k-1)binomial(n, k-1)2^(k-1) if floor(n/2) >= k, otherwise (1/k)binomial(n-1, k-1)binomial(n, k-1)2^(n-k), read by rows.