| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 10 |
| 3 | 46 |
| 4 | 233 |
| 5 | 1196 |
| 6 | 6274 |
| 7 | 33292 |
| 8 | 178378 |
| 9 | 962616 |
| 10 | 5224965 |
| 11 | 28494124 |
| 12 | 156000816 |
| 13 | 856903772 |
| 14 | 4720235840 |
| 15 | 26064910068 |
| 16 | 144236627991 |
| 17 | 799671246842 |
| 18 | 4440913771641 |
| 19 | 24699098156578 |
| 20 | 137553727513369 |
| 21 | 766990846033320 |
| 22 | 4281404671954689 |
| 23 | 23923170440346544 |
[1,2,10,46,233,1196,6274,33292,178378,962616, 5224965,28494124,156000816,856903772,4720235840, 26064910068,144236627991,799671246842, 4440913771641,24699098156578,137553727513369, 766990846033320,4281404671954689, 23923170440346544] |