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| n | a(n) |
|---|---|
| 1 | 278352 |
| 2 | 471308 |
| 3 | 1059410 |
| 4 | 2218212 |
| 5 | 5955918 |
| 6 | 15065380 |
| 7 | 46936958 |
| 8 | 106489596 |
| 9 | 303207968 |
| 10 | 743343900 |
| 11 | 2188773486 |
| 12 | 5233806436 |
| 13 | 15136464648 |
| 14 | 36955782900 |
| 15 | 107935763678 |
| 16 | 260965085900 |
| 17 | 753356059708 |
| 18 | 1846172999084 |
| 19 | 5364518774126 |
[278352,471308,1059410,2218212,5955918,15065380, 46936958,106489596,303207968,743343900,2188773486, 5233806436,15136464648,36955782900,107935763678, 260965085900,753356059708,1846172999084, 5364518774126] |