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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 11 |
| 3 | 46 |
| 4 | 199 |
| 5 | 892 |
| 6 | 4076 |
| 7 | 18863 |
| 8 | 88311 |
| 9 | 416493 |
| 10 | 1977383 |
| 11 | 9436019 |
| 12 | 45216124 |
| 13 | 217454726 |
| 14 | 1048858778 |
| 15 | 5072181339 |
| 16 | 24582872384 |
| 17 | 119374899206 |
| 18 | 580683017523 |
| 19 | 2828923111284 |
| 20 | 13800469252031 |
| 21 | 67405302673001 |
| 22 | 329588546389765 |
| 23 | 1613183039259949 |
| 24 | 7902963915750427 |
| 25 | 38748812549009285 |
| 26 | 190133662073199299 |
[1,3,11,46,199,892,4076,18863,88311,416493, 1977383,9436019,45216124,217454726,1048858778, 5072181339,24582872384,119374899206,580683017523, 2828923111284,13800469252031,67405302673001, 329588546389765,1613183039259949,7902963915750427, 38748812549009285,190133662073199299] |