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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 2 |
| 3 | 3 |
| 4 | 5 |
| 5 | 28 |
| 6 | 89 |
| 7 | 117 |
| 8 | 323 |
| 9 | 440 |
| 10 | 1643 |
| 11 | 8655 |
| 12 | 10298 |
| 13 | 18953 |
| 14 | 29251 |
| 15 | 48204 |
| 16 | 1668187 |
| 17 | 1716391 |
| 18 | 3384578 |
| 19 | 5100969 |
| 20 | 8485547 |
| 21 | 47528704 |
| 22 | 151071659 |
| 23 | 198600363 |
| 24 | 548272385 |
| 25 | 746872748 |
| 26 | 2788890629 |
| 27 | 14691325893 |
| 28 | 17480216522 |
| 29 | 32171542415 |
| 30 | 49651758937 |
| 31 | 81823301352 |
[1,1,2,3,5,28,89,117,323,440,1643,8655,10298, 18953,29251,48204,1668187,1716391,3384578,5100969, 8485547,47528704,151071659,198600363,548272385, 746872748,2788890629,14691325893,17480216522, 32171542415,49651758937,81823301352] |