n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 2 |
4 | 6 |
5 | 17 |
6 | 57 |
7 | 233 |
8 | 989 |
9 | 4602 |
10 | 23794 |
11 | 129285 |
12 | 751973 |
13 | 4680041 |
14 | 30523105 |
15 | 210159654 |
16 | 1521122754 |
17 | 11481486845 |
18 | 90604333205 |
19 | 744420806913 |
20 | 6348340033789 |
21 | 56202980961206 |
22 | 514994183598470 |
23 | 4877587872447801 |
24 | 47711923353493817 |
25 | 481072714151555073 |
26 | 4995769099914083313 |
[1,1,2,6,17,57,233,989,4602,23794,129285,751973, 4680041,30523105,210159654,1521122754,11481486845, 90604333205,744420806913,6348340033789, 56202980961206,514994183598470,4877587872447801, 47711923353493817,481072714151555073, 4995769099914083313] |