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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 2 |
| 3 | 3 |
| 4 | 10 |
| 5 | 14 |
| 6 | 49 |
| 7 | 308 |
| 8 | 775 |
| 9 | 3862 |
| 10 | 41331 |
| 11 | 169669 |
| 12 | 1449423 |
| 13 | 25795923 |
| 14 | 176879439 |
| 15 | 2569800487 |
| 16 | 77632066170 |
| 17 | 900486220900 |
| 18 | 21773916434861 |
| 19 | 1104958273021411 |
| 20 | 21496112349545252 |
| 21 | 875306630139701071 |
| 22 | 74586189583189934357 |
[1,2,2,3,10,14,49,308,775,3862,41331,169669, 1449423,25795923,176879439,2569800487,77632066170, 900486220900,21773916434861,1104958273021411, 21496112349545252,875306630139701071, 74586189583189934357] |