n | a(n) |
---|---|
0 | 1 |
1 | 3 |
2 | 9 |
3 | 26 |
4 | 75 |
5 | 216 |
6 | 622 |
7 | 1791 |
8 | 5157 |
9 | 14849 |
10 | 42756 |
11 | 123111 |
12 | 354484 |
13 | 1020696 |
14 | 2938977 |
15 | 8462447 |
16 | 24366645 |
17 | 70160958 |
18 | 202020427 |
19 | 581694636 |
20 | 1674922950 |
21 | 4822748423 |
22 | 13886550633 |
23 | 39984728949 |
24 | 115131438424 |
25 | 331507764639 |
[1,3,9,26,75,216,622,1791,5157,14849,42756,123111, 354484,1020696,2938977,8462447,24366645,70160958, 202020427,581694636,1674922950,4822748423, 13886550633,39984728949,115131438424,331507764639] |