n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 4 |
3 | 42 |
4 | 530 |
5 | 7489 |
6 | 113289 |
7 | 1794784 |
8 | 29397876 |
9 | 493818165 |
10 | 8460325159 |
11 | 147264321834 |
12 | 2596986868762 |
13 | 46299572773077 |
14 | 833111268412360 |
15 | 15110637698827976 |
16 | 275970530427257207 |
17 | 5070759797283817869 |
18 | 93671715612197557390 |
19 | 1738657226550598494420 |
20 | 32409645286487921390715 |
[1,1,4,42,530,7489,113289,1794784,29397876, 493818165,8460325159,147264321834,2596986868762, 46299572773077,833111268412360,15110637698827976, 275970530427257207,5070759797283817869, 93671715612197557390,1738657226550598494420, 32409645286487921390715] |