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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 2 |
| 3 | 5 |
| 4 | 17 |
| 5 | 55 |
| 6 | 182 |
| 7 | 643 |
| 8 | 2384 |
| 9 | 8953 |
| 10 | 34333 |
| 11 | 133626 |
| 12 | 530606 |
| 13 | 2133524 |
| 14 | 8644984 |
| 15 | 35438834 |
| 16 | 146590627 |
| 17 | 610689574 |
| 18 | 2563048975 |
| 19 | 10817091462 |
| 20 | 45933788835 |
| 21 | 196112722486 |
| 22 | 840788136757 |
| 23 | 3621782958317 |
| 24 | 15663569148973 |
| 25 | 67984934057062 |
| 26 | 296161171799370 |
| 27 | 1294062201532022 |
| 28 | 5671755196756937 |
[1,1,2,5,17,55,182,643,2384,8953,34333,133626, 530606,2133524,8644984,35438834,146590627, 610689574,2563048975,10817091462,45933788835, 196112722486,840788136757,3621782958317, 15663569148973,67984934057062,296161171799370, 1294062201532022,5671755196756937] |