n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 5 |
3 | 16 |
4 | 64 |
5 | 312 |
6 | 1812 |
7 | 12288 |
8 | 95616 |
9 | 840960 |
10 | 8254080 |
11 | 89441280 |
12 | 1060369920 |
13 | 13649610240 |
14 | 189550368000 |
15 | 2824077312000 |
16 | 44927447040000 |
17 | 760034451456000 |
18 | 13622700994560000 |
19 | 257872110354432000 |
20 | 5140559166898176000 |
21 | 107637093007589376000 |
22 | 2361827297364885504000 |
[1,2,5,16,64,312,1812,12288,95616,840960,8254080, 89441280,1060369920,13649610240,189550368000, 2824077312000,44927447040000,760034451456000, 13622700994560000,257872110354432000, 5140559166898176000,107637093007589376000, 2361827297364885504000] |