n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 1 |
3 | 1 |
4 | 1 |
5 | 2 |
6 | 7 |
7 | 22 |
8 | 57 |
9 | 127 |
10 | 379 |
11 | 1849 |
12 | 9109 |
13 | 37324 |
14 | 128129 |
15 | 507508 |
16 | 3031393 |
17 | 19609773 |
18 | 108440893 |
19 | 500515633 |
20 | 2467616641 |
21 | 17154715726 |
22 | 134519207131 |
23 | 927764339426 |
24 | 5359830269641 |
25 | 31580724696907 |
26 | 248587878630807 |
27 | 2259650025239257 |
28 | 18541914182165557 |
[1,1,1,1,1,2,7,22,57,127,379,1849,9109,37324, 128129,507508,3031393,19609773,108440893, 500515633,2467616641,17154715726,134519207131, 927764339426,5359830269641,31580724696907, 248587878630807,2259650025239257, 18541914182165557] |