A086873 - cp's OEIS frontend

A086873 Triangle read by rows in which row n >= 1 gives coefficients in expansion of the polynomial Sum_{k=1..n} (1/n)binomial(n,k)binomial(n,k-1)x^(2k)(1+x)^(2n-2k) / x^2 in powers of x.

n	a(n)
1	1
2	1
3	2
4	2
5	1
6	4
7	9
8	10
9	5
10	1
11	6
12	21
13	44
14	57
15	42
16	14
17	1
18	8
19	38
20	116
21	240
22	336
23	308
24	168
25	42
26	1
27	10
28	60
29	240
30	680
31	1392
32	2060
33	2160
34	1530
35	660
36	132
37	1
38	12
39	87
40	430
41	1545
42	4152
43	8449
44	13014
45	14985
46	12540
47	7227
48	2574
49	429
50	1
51	14
52	119
53	700
54	3045
55	10122
56	26173
57	53048

[1, 1, 2, 2, 1, 4, 9, 10, 5, 1, 6, 21, 44, 57, 42, 14, 1, 8, 38, 116, 240, 336, 308, 168, 42, 1, 10, 60, 240, 680, 1392, 2060, 2160, 1530, 660, 132, 1, 12, 87, 430, 1545, 4152, 8449, 13014, 14985, 12540, 7227, 2574, 429, 1, 14, 119, 700, 3045, 10122, 26173, 53048]

cp's OEIS Frontend

A086873 Triangle read by rows in which row n >= 1 gives coefficients in expansion of the polynomial Sum_{k=1..n} (1/n)binomial(n,k)binomial(n,k-1)x^(2k)(1+x)^(2n-2k) / x^2 in powers of x.

Table of values

List of values

cp's OEIS Frontend

A086873 Triangle read by rows in which row n >= 1 gives coefficients in expansion of the polynomial Sum_{k=1..n} (1/n)*binomial(n,k)*binomial(n,k-1)*x^(2k)*(1+x)^(2n-2k) / x^2 in powers of x.

Table of values

List of values

A086873 Triangle read by rows in which row n >= 1 gives coefficients in expansion of the polynomial Sum_{k=1..n} (1/n)binomial(n,k)binomial(n,k-1)x^(2k)(1+x)^(2n-2k) / x^2 in powers of x.