n | a(n) |
---|---|
0 | 1 |
1 | 4 |
2 | 68 |
3 | 1336 |
4 | 27972 |
5 | 607004 |
6 | 13478072 |
7 | 304083224 |
8 | 6941422916 |
9 | 159882680452 |
10 | 3708781743068 |
11 | 86526900550864 |
12 | 2028273983776440 |
13 | 47733938489878528 |
14 | 1127187050415921304 |
15 | 26694934151138897336 |
16 | 633813403549444601156 |
17 | 15082008687681962081088 |
18 | 359592614152718921447108 |
[1,4,68,1336,27972,607004,13478072,304083224, 6941422916,159882680452,3708781743068, 86526900550864,2028273983776440,47733938489878528, 1127187050415921304,26694934151138897336, 633813403549444601156,15082008687681962081088, 359592614152718921447108] |