A130811 - cp's OEIS frontend

A130811 If X_1,...,X_n is a partition of a 2n-set X into 2-blocks then a(n) is equal to the number of 5-subsets of X containing none of X_i, (i=1,...n).

n	a(n)
5	32
6	192
7	672
8	1792
9	4032
10	8064
11	14784
12	25344
13	41184
14	64064
15	96096
16	139776
17	198016
18	274176
19	372096
20	496128
21	651168
22	842688
23	1076768
24	1360128
25	1700160
26	2104960
27	2583360
28	3144960
29	3800160
30	4560192
31	5437152
32	6444032
33	7594752
34	8904192

[32, 192, 672, 1792, 4032, 8064, 14784, 25344, 41184, 64064, 96096, 139776, 198016, 274176, 372096, 496128, 651168, 842688, 1076768, 1360128, 1700160, 2104960, 2583360, 3144960, 3800160, 4560192, 5437152, 6444032, 7594752, 8904192]

cp's OEIS Frontend

A130811 If X_1,...,X_n is a partition of a 2n-set X into 2-blocks then a(n) is equal to the number of 5-subsets of X containing none of X_i, (i=1,...n).

Table of values

List of values