n | a(n) |
---|---|
1 | 2 |
2 | 7 |
3 | 22 |
4 | 68 |
5 | 205 |
6 | 616 |
7 | 1850 |
8 | 5551 |
9 | 16654 |
10 | 49964 |
11 | 149893 |
12 | 449680 |
13 | 1349042 |
14 | 4047127 |
15 | 12141382 |
16 | 36424148 |
17 | 109272445 |
18 | 327817336 |
19 | 983452010 |
20 | 2950356031 |
21 | 8851068094 |
22 | 26553204284 |
23 | 79659612853 |
24 | 238978838560 |
25 | 716936515682 |
[2,7,22,68,205,616,1850,5551,16654,49964,149893, 449680,1349042,4047127,12141382,36424148, 109272445,327817336,983452010,2950356031, 8851068094,26553204284,79659612853,238978838560, 716936515682] |