n | a(n) |
---|---|
1 | 0 |
2 | 31 |
3 | 296 |
4 | 1922 |
5 | 10491 |
6 | 50690 |
7 | 226771 |
8 | 963728 |
9 | 3941732 |
10 | 15655280 |
11 | 60749739 |
12 | 231325874 |
13 | 867192006 |
14 | 3208394065 |
15 | 11737643962 |
16 | 42526452550 |
17 | 152777627539 |
18 | 544782076812 |
19 | 1929805835927 |
20 | 6795769111934 |
21 | 23804414728200 |
22 | 82983605105905 |
[0,31,296,1922,10491,50690,226771,963728,3941732, 15655280,60749739,231325874,867192006,3208394065, 11737643962,42526452550,152777627539,544782076812, 1929805835927,6795769111934,23804414728200, 82983605105905] |