A011846-OEIS公司

A011846号作为一个简单的表

n个	a（n）
0	0
1	0
2	0
三	0
4	0
5	0
6	0
7	0
8	0
9	0
10	1
11	5
12	22
13	71
14	200
15	500
16	1144
17	2431
18	4862
19	9237
20	16796
21	29393
22	49742
23	81719
24	130750
25	204297
26	312455
27	468682
28	690690
29	1001500
30	1430715
31	2016007
32	2804880
33	3856710
34	5245125
35	7060746

[0,0,0,0,0,0,0,0,0,0,1,5,22,71,200,500,1144,2431,4862,9237,16796,29393,49742,81719,130750,204297,312455,468682,690690,1001500,1430715,2016007,2804880,3856710,5245125,7060746]