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| n | a(n) |
|---|---|
| 0 | 7 |
| 1 | 19 |
| 2 | 64 |
| 3 | 250 |
| 4 | 1098 |
| 5 | 5317 |
| 6 | 28009 |
| 7 | 158926 |
| 8 | 963913 |
| 9 | 6211190 |
| 10 | 42309103 |
| 11 | 303388298 |
| 12 | 2282055551 |
| 13 | 17950884133 |
| 14 | 147271359890 |
| 15 | 1257195981186 |
| 16 | 11143814730044 |
| 17 | 102376602296871 |
| 18 | 973137213352285 |
| 19 | 9556384509085448 |
| 20 | 96818497703286895 |
| 21 | 1010691906511682642 |
[7,19,64,250,1098,5317,28009,158926,963913, 6211190,42309103,303388298,2282055551,17950884133, 147271359890,1257195981186,11143814730044, 102376602296871,973137213352285,9556384509085448, 96818497703286895,1010691906511682642] |