n | a(n) |
---|---|
1 | 2 |
2 | 4 |
3 | 22 |
4 | 74 |
5 | 250 |
6 | 848 |
7 | 2851 |
8 | 9535 |
9 | 31888 |
10 | 106775 |
11 | 357028 |
12 | 1193927 |
13 | 3992279 |
14 | 13348541 |
15 | 44630321 |
16 | 149215567 |
17 | 498878032 |
18 | 1667898396 |
19 | 5576255601 |
20 | 18642932177 |
21 | 62328230082 |
22 | 208379401186 |
23 | 696665636518 |
24 | 2329130179184 |
25 | 7786871066006 |
[2,4,22,74,250,848,2851,9535,31888,106775,357028, 1193927,3992279,13348541,44630321,149215567, 498878032,1667898396,5576255601,18642932177, 62328230082,208379401186,696665636518, 2329130179184,7786871066006] |