A030993-OEIS公司

A030993号作为一个简单的表

n个	a（n）
1	2
2	72
三	672
4	8672
5	88672
6	388672
7	3388672
8	23388672
9	223388672
10	223388672
11	10223388672
12	510223388672
13	7510223388672
14	67510223388672
15	967510223388672
16	7967510223388672
17	67967510223388672

[2,72,672,8672,88672,388672,3388672,23388672,223388672,223388672,10223388672,510223388672,7510223388672,67510223388672,967510223388672,7967510223388672,67967510223388672]