n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 8 |
3 | 36 |
4 | 170 |
5 | 824 |
6 | 4060 |
7 | 20232 |
8 | 101664 |
9 | 514140 |
10 | 2613468 |
11 | 13340496 |
12 | 68335644 |
13 | 351087128 |
14 | 1808405600 |
15 | 9335697424 |
16 | 48289295226 |
17 | 250213951992 |
18 | 1298517484804 |
19 | 6748250144600 |
20 | 35114221973600 |
21 | 182924946400680 |
22 | 953931045159000 |
23 | 4979398271047200 |
24 | 26014703727203100 |
[1,2,8,36,170,824,4060,20232,101664,514140, 2613468,13340496,68335644,351087128,1808405600, 9335697424,48289295226,250213951992,1298517484804, 6748250144600,35114221973600,182924946400680, 953931045159000,4979398271047200, 26014703727203100] |