n | a(n) |
---|---|
0 | 1 |
1 | 3 |
2 | 12 |
3 | 50 |
4 | 219 |
5 | 983 |
6 | 4495 |
7 | 20831 |
8 | 97495 |
9 | 459905 |
10 | 2182892 |
11 | 10413446 |
12 | 49885007 |
13 | 239810963 |
14 | 1156285326 |
15 | 5589527618 |
16 | 27080304481 |
17 | 131455790797 |
18 | 639225917752 |
19 | 3113108665530 |
20 | 15182006797049 |
21 | 74130912066731 |
22 | 362371028187997 |
23 | 1773157437378049 |
24 | 8684450458034151 |
25 | 42570128073545983 |
26 | 208836096127242016 |
[1,3,12,50,219,983,4495,20831,97495,459905, 2182892,10413446,49885007,239810963,1156285326, 5589527618,27080304481,131455790797,639225917752, 3113108665530,15182006797049,74130912066731, 362371028187997,1773157437378049,8684450458034151, 42570128073545983,208836096127242016] |