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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 27 |
| 3 | 47 |
| 4 | 610 |
| 5 | 769 |
| 6 | 4353 |
| 7 | 9126 |
| 8 | 25389 |
| 9 | 33798 |
| 10 | 85437 |
| 11 | 105502 |
| 12 | 224414 |
| 13 | 342993 |
| 14 | 608338 |
| 15 | 731220 |
| 16 | 1297874 |
| 17 | 1513366 |
| 18 | 2471660 |
| 19 | 3316174 |
| 20 | 4892872 |
| 21 | 5594456 |
| 22 | 8495902 |
| 23 | 10580268 |
| 24 | 14864909 |
| 25 | 18500679 |
| 26 | 24975320 |
| 27 | 28034979 |
| 28 | 39173178 |
| 29 | 43315043 |
| 30 | 56273764 |
| 31 | 67819100 |
[0,27,47,610,769,4353,9126,25389,33798,85437, 105502,224414,342993,608338,731220,1297874, 1513366,2471660,3316174,4892872,5594456,8495902, 10580268,14864909,18500679,24975320,28034979, 39173178,43315043,56273764,67819100] |