n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 10 |
3 | 56 |
4 | 404 |
5 | 3272 |
6 | 30688 |
7 | 316304 |
8 | 3609656 |
9 | 44624624 |
10 | 597131600 |
11 | 8555752064 |
12 | 130941724064 |
13 | 2127005759296 |
14 | 36577172243776 |
15 | 663151898857856 |
16 | 12646212723268576 |
17 | 252922802230850496 |
18 | 5294480128736395456 |
19 | 115747660924409952512 |
20 | 2638244919080808844544 |
[1,2,10,56,404,3272,30688,316304,3609656,44624624, 597131600,8555752064,130941724064,2127005759296, 36577172243776,663151898857856,12646212723268576, 252922802230850496,5294480128736395456, 115747660924409952512,2638244919080808844544] |