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| n | a(n) |
|---|---|
| 1 | 256 |
| 2 | 2504 |
| 3 | 23244 |
| 4 | 177050 |
| 5 | 1284356 |
| 6 | 8458978 |
| 7 | 53679123 |
| 8 | 323510768 |
| 9 | 1900038196 |
| 10 | 10843837860 |
| 11 | 60860178932 |
| 12 | 336133010594 |
| 13 | 1837617407194 |
| 14 | 9957647836284 |
| 15 | 53642511855713 |
| 16 | 287612228679958 |
| 17 | 1537162267470632 |
| 18 | 8195476523676532 |
[256,2504,23244,177050,1284356,8458978,53679123, 323510768,1900038196,10843837860,60860178932, 336133010594,1837617407194,9957647836284, 53642511855713,287612228679958,1537162267470632, 8195476523676532] |