n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 4 |
3 | 18 |
4 | 154 |
5 | 1614 |
6 | 23733 |
7 | 396190 |
8 | 8066984 |
9 | 183930948 |
10 | 4811382339 |
11 | 138718632336 |
12 | 4451963556127 |
13 | 155416836338920 |
14 | 5920554613563841 |
15 | 242873491536944706 |
16 | 10725017764009207613 |
17 | 505671090907469848248 |
18 | 25415190929321149684700 |
19 | 1354279188424092012064226 |
[1,1,4,18,154,1614,23733,396190,8066984,183930948, 4811382339,138718632336,4451963556127, 155416836338920,5920554613563841, 242873491536944706,10725017764009207613, 505671090907469848248,25415190929321149684700, 1354279188424092012064226] |