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| n | a(n) |
|---|---|
| 0 | 2 |
| 1 | 2 |
| 2 | 10 |
| 3 | 114 |
| 4 | 1842 |
| 5 | 37226 |
| 6 | 902570 |
| 7 | 25530658 |
| 8 | 825345250 |
| 9 | 30016622298 |
| 10 | 1212957186330 |
| 11 | 53916514446482 |
| 12 | 2614488320210258 |
| 13 | 137345270749953610 |
| 14 | 7770078330925987210 |
| 15 | 470977659902530345986 |
| 16 | 30451167044311817097666 |
| 17 | 2091878780326890801618362 |
[2,2,10,114,1842,37226,902570,25530658,825345250, 30016622298,1212957186330,53916514446482, 2614488320210258,137345270749953610, 7770078330925987210,470977659902530345986, 30451167044311817097666,2091878780326890801618362] |