A104990-OEIS公司

A104990号作为一个简单的表

n个	a（n）
0	1
1	三
2	1
三	15
4	6
5	1
6	93
7	39
8	9
9	1
10	675
11	285
12	75
13	12
14	1
15	5577
16	2331
17	657
18	123
19	15
20	1
21	51555
22	21153
23	6207
24	1269
25	183
26	18
27	1
28	526809
29	211227
30	63549
31	13743
32	2181
33	255
34	21
35	1
36	5895819
37	2304321
38	704319
39	158325
40	26739
41	3453
42	339
43	24
44	1
45	71733585
46	27291843
47	8424813
48	1947711
49	343641
50	47355
51	5145
52	435
53	27
54	1

[1,3,1,15,6,1,93,39,9,1,675,285,75,12,1,5577,2331,657,123,15,1,51555,21153,6207,1269,183,18,1,526809,211227,63549,13743,2181,255,21,1,5895819,2304321,704319,158325,26739,3453,339,24,1,71733585,27291843,8424813,1947711,343641,47355,5145,435,27,1]