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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 26 |
| 3 | 59 |
| 4 | 476 |
| 5 | 751 |
| 6 | 7024 |
| 7 | 16319 |
| 8 | 115136 |
| 9 | 195327 |
| 10 | 1776384 |
| 11 | 4177919 |
| 12 | 29474816 |
| 13 | 50003967 |
| 14 | 454754304 |
| 15 | 1069547519 |
| 16 | 7545552896 |
| 17 | 12801015807 |
| 18 | 116417101824 |
| 19 | 273804165119 |
| 20 | 1931661541376 |
| 21 | 3277060046847 |
| 22 | 29802778066944 |
| 23 | 70093866270719 |
| 24 | 494505354592256 |
[1,1,26,59,476,751,7024,16319,115136,195327, 1776384,4177919,29474816,50003967,454754304, 1069547519,7545552896,12801015807,116417101824, 273804165119,1931661541376,3277060046847, 29802778066944,70093866270719,494505354592256] |