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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 5 |
| 3 | 16 |
| 4 | 61 |
| 5 | 256 |
| 6 | 1133 |
| 7 | 5191 |
| 8 | 24403 |
| 9 | 117066 |
| 10 | 570835 |
| 11 | 2821026 |
| 12 | 14097839 |
| 13 | 71121660 |
| 14 | 361718339 |
| 15 | 1852640518 |
| 16 | 9547375955 |
| 17 | 49469352300 |
| 18 | 257564997407 |
| 19 | 1346840074300 |
| 20 | 7070283106575 |
| 21 | 37246786128714 |
| 22 | 196849114734855 |
| 23 | 1043398553112059 |
| 24 | 5545408681615257 |
[1,2,5,16,61,256,1133,5191,24403,117066,570835, 2821026,14097839,71121660,361718339,1852640518, 9547375955,49469352300,257564997407,1346840074300, 7070283106575,37246786128714,196849114734855, 1043398553112059,5545408681615257] |