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| n | a(n) |
|---|---|
| 1 | 10 |
| 2 | 19 |
| 3 | 109 |
| 4 | 560 |
| 5 | 2410 |
| 6 | 9094 |
| 7 | 32575 |
| 8 | 114987 |
| 9 | 396917 |
| 10 | 1315916 |
| 11 | 4156201 |
| 12 | 12519404 |
| 13 | 36142411 |
| 14 | 100533680 |
| 15 | 270678655 |
| 16 | 708009173 |
| 17 | 1804416902 |
| 18 | 4491311579 |
| 19 | 10939219139 |
| 20 | 26113766099 |
| 21 | 61178754251 |
| 22 | 140820281122 |
| 23 | 318767877586 |
[10,19,109,560,2410,9094,32575,114987,396917, 1315916,4156201,12519404,36142411,100533680, 270678655,708009173,1804416902,4491311579, 10939219139,26113766099,61178754251,140820281122, 318767877586] |