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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 3 |
| 3 | 10 |
| 4 | 35 |
| 5 | 134 |
| 6 | 544 |
| 7 | 2288 |
| 8 | 9907 |
| 9 | 43830 |
| 10 | 197300 |
| 11 | 900738 |
| 12 | 4160521 |
| 13 | 19408084 |
| 14 | 91302317 |
| 15 | 432663728 |
| 16 | 2063421045 |
| 17 | 9896113574 |
| 18 | 47698770359 |
| 19 | 230932635206 |
| 20 | 1122545149941 |
| 21 | 5476405604806 |
| 22 | 26805046064328 |
| 23 | 131595640014314 |
| 24 | 647829955225386 |
| 25 | 3197267300375652 |
[1,2,3,10,35,134,544,2288,9907,43830,197300, 900738,4160521,19408084,91302317,432663728, 2063421045,9896113574,47698770359,230932635206, 1122545149941,5476405604806,26805046064328, 131595640014314,647829955225386,3197267300375652] |