n | a(n) |
---|---|
1 | 1 |
2 | 6 |
3 | 23 |
4 | 100 |
5 | 421 |
6 | 1786 |
7 | 7563 |
8 | 32040 |
9 | 135721 |
10 | 574926 |
11 | 2435423 |
12 | 10316620 |
13 | 43701901 |
14 | 185124226 |
15 | 784198803 |
16 | 3321919440 |
17 | 14071876561 |
18 | 59609425686 |
19 | 252509579303 |
20 | 1069647742900 |
21 | 4531100550901 |
22 | 19194049946506 |
23 | 81307300336923 |
24 | 344423251294200 |
25 | 1459000305513721 |
[1,6,23,100,421,1786,7563,32040,135721,574926, 2435423,10316620,43701901,185124226,784198803, 3321919440,14071876561,59609425686,252509579303, 1069647742900,4531100550901,19194049946506, 81307300336923,344423251294200,1459000305513721] |