n | a(n) |
---|---|
0 | 1 |
1 | 11 |
2 | 42 |
3 | 145 |
4 | 473 |
5 | 1484 |
6 | 4529 |
7 | 13543 |
8 | 39870 |
9 | 115937 |
10 | 333781 |
11 | 953056 |
12 | 2702497 |
13 | 7618115 |
14 | 21365778 |
15 | 59657329 |
16 | 165926609 |
17 | 459905588 |
18 | 1270819025 |
19 | 3501855007 |
20 | 9625627686 |
21 | 26398369601 |
22 | 72248624077 |
23 | 197361589960 |
24 | 538199264833 |
[1,11,42,145,473,1484,4529,13543,39870,115937, 333781,953056,2702497,7618115,21365778,59657329, 165926609,459905588,1270819025,3501855007, 9625627686,26398369601,72248624077,197361589960, 538199264833] |