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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 2 |
| 3 | 4 |
| 4 | 10 |
| 5 | 27 |
| 6 | 79 |
| 7 | 242 |
| 8 | 770 |
| 9 | 2526 |
| 10 | 8482 |
| 11 | 29081 |
| 12 | 101381 |
| 13 | 358448 |
| 14 | 1282833 |
| 15 | 4638642 |
| 16 | 16923338 |
| 17 | 62222809 |
| 18 | 230338989 |
| 19 | 857789608 |
| 20 | 3211367100 |
| 21 | 12079381400 |
| 22 | 45627168971 |
| 23 | 172996707877 |
| 24 | 658150503220 |
| 25 | 2511554427265 |
| 26 | 9610919774235 |
| 27 | 36870810085355 |
| 28 | 141774779218300 |
| 29 | 546295776440781 |
| 30 | 2109079351378737 |
[1,1,2,4,10,27,79,242,770,2526,8482,29081,101381, 358448,1282833,4638642,16923338,62222809, 230338989,857789608,3211367100,12079381400, 45627168971,172996707877,658150503220, 2511554427265,9610919774235,36870810085355, 141774779218300,546295776440781,2109079351378737] |