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| n | a(n) |
|---|---|
| 2 | 10 |
| 3 | 190 |
| 4 | 1568 |
| 5 | 8344 |
| 6 | 33580 |
| 7 | 111100 |
| 8 | 317680 |
| 9 | 811096 |
| 10 | 1891318 |
| 11 | 4094090 |
| 12 | 8328320 |
| 13 | 16071120 |
| 14 | 29636984 |
| 15 | 52540472 |
| 16 | 89974880 |
| 17 | 149432720 |
| 18 | 241497410 |
| 19 | 380839382 |
| 20 | 587453856 |
| 21 | 888181800 |
| 22 | 1318560100 |
| 23 | 1925051700 |
| 24 | 2767711440 |
| 25 | 3923348520 |
| 26 | 5489251950 |
| 27 | 7587551010 |
| 28 | 10370288640 |
[10,190,1568,8344,33580,111100,317680,811096, 1891318,4094090,8328320,16071120,29636984, 52540472,89974880,149432720,241497410,380839382, 587453856,888181800,1318560100,1925051700, 2767711440,3923348520,5489251950,7587551010, 10370288640] |