n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 1 |
4 | 4 |
5 | 8 |
6 | 38 |
7 | 206 |
8 | 1200 |
9 | 6824 |
10 | 50912 |
11 | 446752 |
12 | 3828592 |
13 | 38953680 |
14 | 411358960 |
15 | 4740541440 |
16 | 57933236928 |
17 | 759535226432 |
18 | 10488778719488 |
19 | 156933187370432 |
20 | 2425018017191040 |
21 | 40031753222399360 |
22 | 689218695990369536 |
23 | 12461424512466701312 |
24 | 234386152841716303616 |
[1,1,1,4,8,38,206,1200,6824,50912,446752,3828592, 38953680,411358960,4740541440,57933236928, 759535226432,10488778719488,156933187370432, 2425018017191040,40031753222399360, 689218695990369536,12461424512466701312, 234386152841716303616] |