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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 1508 |
| 3 | 62882 |
| 4 | 162919 |
| 5 | 430995 |
| 6 | 919632 |
| 7 | 1818257 |
| 8 | 3326246 |
| 9 | 5744641 |
| 10 | 9601436 |
| 11 | 15859355 |
| 12 | 26033851 |
| 13 | 42510000 |
| 14 | 69365630 |
| 15 | 113056482 |
| 16 | 183794484 |
| 17 | 298249938 |
| 18 | 483393766 |
| 19 | 782278654 |
| 20 | 1263834968 |
| 21 | 2038915696 |
| 22 | 3284498896 |
| 23 | 5282364942 |
[0,1508,62882,162919,430995,919632,1818257, 3326246,5744641,9601436,15859355,26033851, 42510000,69365630,113056482,183794484,298249938, 483393766,782278654,1263834968,2038915696, 3284498896,5282364942] |