n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 4 |
4 | 13 |
5 | 64 |
6 | 315 |
7 | 1727 |
8 | 9658 |
9 | 55657 |
10 | 325390 |
11 | 1929160 |
12 | 11555172 |
13 | 69840032 |
14 | 425318971 |
15 | 2607388905 |
16 | 16077392564 |
17 | 99646239355 |
18 | 620439153165 |
19 | 3879069845640 |
20 | 24342884609625 |
21 | 153279112388352 |
22 | 968123122592340 |
23 | 6131992590993204 |
24 | 38940057166651848 |
[1,1,4,13,64,315,1727,9658,55657,325390,1929160, 11555172,69840032,425318971,2607388905, 16077392564,99646239355,620439153165, 3879069845640,24342884609625,153279112388352, 968123122592340,6131992590993204, 38940057166651848] |