n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 4 |
4 | 9 |
5 | 21 |
6 | 51 |
7 | 127 |
8 | 323 |
9 | 835 |
10 | 2187 |
11 | 5787 |
12 | 15435 |
13 | 41419 |
14 | 111659 |
15 | 302059 |
16 | 819243 |
17 | 2226219 |
18 | 6058155 |
19 | 16503211 |
20 | 44991659 |
21 | 122727595 |
22 | 334914219 |
23 | 914235051 |
24 | 2496201387 |
25 | 6816678571 |
26 | 18617371307 |
27 | 50851322539 |
28 | 138903833259 |
29 | 379443202731 |
30 | 1036559854251 |
[1,1,2,4,9,21,51,127,323,835,2187,5787,15435, 41419,111659,302059,819243,2226219,6058155, 16503211,44991659,122727595,334914219,914235051, 2496201387,6816678571,18617371307,50851322539, 138903833259,379443202731,1036559854251] |