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| n | a(n) |
|---|---|
| 1 | 4213 |
| 2 | 15111 |
| 3 | 44525 |
| 4 | 119359 |
| 5 | 305429 |
| 6 | 764315 |
| 7 | 1893433 |
| 8 | 4673299 |
| 9 | 11537593 |
| 10 | 28584535 |
| 11 | 71295237 |
| 12 | 179606071 |
| 13 | 458428429 |
| 14 | 1188689987 |
| 15 | 3137057025 |
| 16 | 8433329995 |
| 17 | 23088675409 |
| 18 | 64300637535 |
| 19 | 181823356333 |
| 20 | 520893887439 |
| 21 | 1508445493253 |
[4213,15111,44525,119359,305429,764315,1893433, 4673299,11537593,28584535,71295237,179606071, 458428429,1188689987,3137057025,8433329995, 23088675409,64300637535,181823356333,520893887439, 1508445493253] |