A278906-组织环境信息系统

A278906型作为一个简单的表

n个	a（n）
0	1
1	0
2	6
三	1
4	24
5	15
6	72
7	119
8	16
9	975
10	352
11	3615
12	896
13	14591
14	3200
15	50559
16	30976
17	157439
18	131584
19	260607
20	1068032
21	1991679
22	593920
23	16687103
24	6868992
25	51654655
26	9641984
27	226598911
28	16302080
29	1013858303
30	100859904
31	4092723199
32	429719552
33	15166799871

[1,0,6,1,24,15,72,119,16,975,352,3615,896,14591,3200,50559,30976,157439,131584,260607,1068032,1991679,593920,16687103,6868992,51654655,9641984,226598911,16302080,1013858303,100859904,4092723199,429719552,15166799871]