n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 15 |
3 | 138 |
4 | 1435 |
5 | 16074 |
6 | 189238 |
7 | 2308640 |
8 | 28927579 |
9 | 370084760 |
10 | 4814147248 |
11 | 63482437724 |
12 | 846678807008 |
13 | 11401357736202 |
14 | 154800183842738 |
15 | 2116833422071448 |
16 | 29128279396373599 |
17 | 403029526567463278 |
18 | 5603854904038673961 |
19 | 78260199678455985082 |
20 | 1097257906416031628336 |
[1,2,15,138,1435,16074,189238,2308640,28927579, 370084760,4814147248,63482437724,846678807008, 11401357736202,154800183842738,2116833422071448, 29128279396373599,403029526567463278, 5603854904038673961,78260199678455985082, 1097257906416031628336] |