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| n | a(n) |
|---|---|
| 1 | 8 |
| 2 | 112 |
| 3 | 587 |
| 4 | 3389 |
| 5 | 19089 |
| 6 | 111354 |
| 7 | 640778 |
| 8 | 3716432 |
| 9 | 21502354 |
| 10 | 124531091 |
| 11 | 721152740 |
| 12 | 4176107752 |
| 13 | 24184974414 |
| 14 | 140057032575 |
| 15 | 811098268642 |
| 16 | 4697197830808 |
| 17 | 27202297829372 |
| 18 | 157533202227607 |
| 19 | 912302039312046 |
| 20 | 5283299749392401 |
[8,112,587,3389,19089,111354,640778,3716432, 21502354,124531091,721152740,4176107752, 24184974414,140057032575,811098268642, 4697197830808,27202297829372,157533202227607, 912302039312046,5283299749392401] |