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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 2 |
| 3 | 10 |
| 4 | 59 |
| 5 | 339 |
| 6 | 1908 |
| 7 | 10660 |
| 8 | 59493 |
| 9 | 332469 |
| 10 | 1861910 |
| 11 | 10451086 |
| 12 | 58793535 |
| 13 | 331434215 |
| 14 | 1871929768 |
| 15 | 10590886536 |
| 16 | 60014622089 |
| 17 | 340566437545 |
| 18 | 1935134951402 |
| 19 | 11008701669202 |
| 20 | 62694973984771 |
| 21 | 357406440776891 |
| 22 | 2039344466594972 |
| 23 | 11646264778160300 |
| 24 | 66561506740727149 |
[1,1,2,10,59,339,1908,10660,59493,332469,1861910, 10451086,58793535,331434215,1871929768, 10590886536,60014622089,340566437545, 1935134951402,11008701669202,62694973984771, 357406440776891,2039344466594972, 11646264778160300,66561506740727149] |