A060552-OEIS公司

A060552号作为一个简单的表

n个	a（n）
1	0
2	0
三	0
4	1
5	2
6	7
7	14
8	35
9	70
10	154
11	310
12	650
13	1300
14	2666
15	5332
16	10788
17	21588
18	43428
19	86856
20	174244
21	348488
22	697992
23	1396040
24	2794120
25	5588240
26	11180680
27	22361360
28	44730896
29	89462032
30	178940432
31	357880864
32	715794960

[0,0,0,1,2,7,14,35,70,154,310,650,1300,2666,5332,10788,21588,43428,86856,174244,348488,697992,1396040,2794120,5588240,11180680,22361360,44730896,89462032,178940432,357880864,715794960]