A051290 - cp's OEIS frontend

A051290 Triangular array T read by rows: T(n,k)=P(2n+3,n,2k+3), where P(n,k,c)=number of vectors (x(1),x(2,),...,x(n)) of k 1's and n-k 0's such that x(i)=x(n+1-i) for exactly c values of i.

n	a(n)
0	1
1	4
2	1
3	12
4	6
5	3
6	32
7	24
8	24
9	4
10	80
11	80
12	120
13	40
14	10
15	192
16	240
17	480
18	240
19	120
20	15
21	448
22	672
23	1680
24	1120
25	840
26	210
27	35
28	1024
29	1792
30	5376
31	4480
32	4480
33	1680
34	560
35	56
36	2304
37	4608
38	16128
39	16128
40	20160
41	10080
42	5040
43	1008
44	126

[1, 4, 1, 12, 6, 3, 32, 24, 24, 4, 80, 80, 120, 40, 10, 192, 240, 480, 240, 120, 15, 448, 672, 1680, 1120, 840, 210, 35, 1024, 1792, 5376, 4480, 4480, 1680, 560, 56, 2304, 4608, 16128, 16128, 20160, 10080, 5040, 1008, 126]

cp's OEIS Frontend

A051290 Triangular array T read by rows: T(n,k)=P(2n+3,n,2k+3), where P(n,k,c)=number of vectors (x(1),x(2,),...,x(n)) of k 1's and n-k 0's such that x(i)=x(n+1-i) for exactly c values of i.

Table of values

List of values