n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 4 |
3 | 11 |
4 | 42 |
5 | 130 |
6 | 506 |
7 | 1701 |
8 | 6678 |
9 | 23348 |
10 | 92162 |
11 | 330718 |
12 | 1310042 |
13 | 4785834 |
14 | 19002354 |
15 | 70329169 |
16 | 279708134 |
17 | 1045513784 |
18 | 4163154786 |
19 | 15682361864 |
20 | 62502107274 |
21 | 236910288210 |
22 | 944854095762 |
23 | 3599694071586 |
24 | 14364065086506 |
25 | 54956626517442 |
26 | 219388412771714 |
27 | 842388119494786 |
28 | 3363960168087706 |
[1,1,4,11,42,130,506,1701,6678,23348,92162,330718, 1310042,4785834,19002354,70329169,279708134, 1045513784,4163154786,15682361864,62502107274, 236910288210,944854095762,3599694071586, 14364065086506,54956626517442,219388412771714, 842388119494786,3363960168087706] |