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| n | a(n) |
|---|---|
| 1 | 64 |
| 2 | 3281 |
| 3 | 5631 |
| 4 | 22819 |
| 5 | 105709 |
| 6 | 488812 |
| 7 | 2207509 |
| 8 | 10286880 |
| 9 | 48492179 |
| 10 | 225721140 |
| 11 | 1052511651 |
| 12 | 4943137693 |
| 13 | 23205542625 |
| 14 | 108821827316 |
| 15 | 511190051629 |
| 16 | 2403886138964 |
| 17 | 11305007633490 |
| 18 | 53192247798072 |
| 19 | 250461934195726 |
[64,3281,5631,22819,105709,488812,2207509, 10286880,48492179,225721140,1052511651,4943137693, 23205542625,108821827316,511190051629, 2403886138964,11305007633490,53192247798072, 250461934195726] |