A108478-OEIS公司

A108478号作为一个简单的表

n个	a（n）
0	1
1	1
2	2
三	14
4	43
5	127
6	468
7	1596
8	5253
9	17917
10	60918
11	205194
12	694287
13	2351611
14	7951336
15	26894840
16	91004105
17	307854073
18	1041410602
19	3523170438
20	11918842803
21	40320750711
22	136404504124
23	461454010164
24	1561085306061
25	5281113937653

[1,1,2,14,43,127,468,1596,5253,17917,60918,205194,694287,2351611,7951336,26894840,91004105,307854073,1041410602,3523170438,11918842803,40320750711,136404504124,461454010164,1561085306061,5281113937653]