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| n | a(n) |
|---|---|
| 1 | 64 |
| 2 | 4096 |
| 3 | 61996 |
| 4 | 321163 |
| 5 | 1023339 |
| 6 | 2715255 |
| 7 | 6789502 |
| 8 | 16634224 |
| 9 | 40086061 |
| 10 | 94218637 |
| 11 | 214377471 |
| 12 | 470774847 |
| 13 | 998649425 |
| 14 | 2051656863 |
| 15 | 4092563126 |
| 16 | 7942987666 |
| 17 | 15025087905 |
| 18 | 27743027247 |
| 19 | 50072239147 |
| 20 | 88451496245 |
| 21 | 153108327757 |
[64,4096,61996,321163,1023339,2715255,6789502, 16634224,40086061,94218637,214377471,470774847, 998649425,2051656863,4092563126,7942987666, 15025087905,27743027247,50072239147,88451496245, 153108327757] |