A309738-OEIS公司

A309738型作为一个简单的表

n个	a（n）
1	三
2	7
三	13
4	31
5	43
6	73
7	421
8	2551
9	6481
10	8191
11	250501
12	4002001
13	64008001
14	81009001
15	40000200001
16	90000300001
17	64000008000001
18	400000000020000000001
19	3600000000060000000001
20	64000000000008000000000001
21	90000000000000300000000000001
22	250000000000000500000000000001

[3,7,13,31,43,73,421,2551,6481,8191,250501,4002001,64008001,81009001,40000200001,90000300001,64000008000001,400000000020000000001,3600000000060000000001,64000000000008000000000001,90000000000000300000000000001,250000000000000500000000000001]