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n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 7 |
3 | 21 |
4 | 66 |
5 | 205 |
6 | 639 |
7 | 1990 |
8 | 6199 |
9 | 19309 |
10 | 60146 |
11 | 187349 |
12 | 583575 |
13 | 1817782 |
14 | 5662223 |
15 | 17637301 |
16 | 54938562 |
17 | 171128541 |
18 | 533049583 |
19 | 1660400166 |
20 | 5171992999 |
21 | 16110279997 |
22 | 50182032658 |
23 | 156312391973 |
24 | 486898648583 |
25 | 1516644272406 |
[1,2,7,21,66,205,639,1990,6199,19309,60146,187349, 583575,1817782,5662223,17637301,54938562, 171128541,533049583,1660400166,5171992999, 16110279997,50182032658,156312391973,486898648583, 1516644272406] |