A081567-OEIS公司

A081567号作为一个简单的表

n个	a（n）
0	1
1	三
2	10
三	35
4	125
5	450
6	1625
7	5875
8	21250
9	76875
10	278125
11	1006250
12	3640625
13	13171875
14	47656250
15	172421875
16	623828125
17	2257031250
18	8166015625
19	29544921875
20	106894531250
21	386748046875
22	1399267578125
23	5062597656250
24	18316650390625
25	66270263671875
26	239768066406250

[1,3,10,35,125,450,1625,5875,21250,76875,278125,1006250,3640625,13171875,47656250,172421875,623828125,2257031250,8166015625,29544921875,106894531250,386748046875,1399267578125,5062597656250,18316650390625,66270263671875,239768066406250]