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| n | a(n) |
|---|---|
| 1 | 38 |
| 2 | 152 |
| 3 | 565 |
| 4 | 2326 |
| 5 | 9554 |
| 6 | 40297 |
| 7 | 170754 |
| 8 | 728996 |
| 9 | 3120401 |
| 10 | 13387658 |
| 11 | 57499978 |
| 12 | 247151833 |
| 13 | 1062764258 |
| 14 | 4571134864 |
| 15 | 19664166357 |
| 16 | 84599301422 |
| 17 | 363983008394 |
| 18 | 1566063674345 |
| 19 | 6738231845242 |
| 20 | 28992616966540 |
| 21 | 124747487937041 |
[38,152,565,2326,9554,40297,170754,728996,3120401, 13387658,57499978,247151833,1062764258,4571134864, 19664166357,84599301422,363983008394, 1566063674345,6738231845242,28992616966540, 124747487937041] |