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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 2 |
| 5 | 3 |
| 6 | 6 |
| 7 | 12 |
| 8 | 25 |
| 9 | 52 |
| 10 | 113 |
| 11 | 247 |
| 12 | 548 |
| 13 | 1226 |
| 14 | 2770 |
| 15 | 6299 |
| 16 | 14426 |
| 17 | 33209 |
| 18 | 76851 |
| 19 | 178618 |
| 20 | 416848 |
| 21 | 976296 |
| 22 | 2294224 |
| 23 | 5407384 |
| 24 | 12780394 |
| 25 | 30283120 |
| 26 | 71924647 |
| 27 | 171196956 |
| 28 | 408310668 |
| 29 | 975662480 |
| 30 | 2335443077 |
| 31 | 5599508648 |
| 32 | 13446130438 |
| 33 | 32334837886 |
| 34 | 77863375126 |
| 35 | 187737500013 |
| 36 | 453203435319 |
| 37 | 1095295264857 |
| 38 | 2649957419351 |
[0,1,1,1,2,3,6,12,25,52,113,247,548,1226,2770, 6299,14426,33209,76851,178618,416848,976296, 2294224,5407384,12780394,30283120,71924647, 171196956,408310668,975662480,2335443077, 5599508648,13446130438,32334837886,77863375126, 187737500013,453203435319,1095295264857, 2649957419351] |