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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 4 |
| 2 | 22 |
| 3 | 32 |
| 4 | 488 |
| 5 | 5408 |
| 6 | 70544 |
| 7 | 23552 |
| 8 | 1202048 |
| 9 | 22846976 |
| 10 | 22850816 |
| 11 | 40431616 |
| 12 | 2628156416 |
| 13 | 1576923136 |
| 14 | 228655904768 |
| 15 | 416962576384 |
| 16 | 2362792902656 |
| 17 | 7088385949696 |
| 18 | 262270410489856 |
| 19 | 52454094798848 |
| 20 | 2150618140770304 |
| 21 | 92476585387491328 |
| 22 | 462382939977023488 |
[1,4,22,32,488,5408,70544,23552,1202048,22846976, 22850816,40431616,2628156416,1576923136, 228655904768,416962576384,2362792902656, 7088385949696,262270410489856,52454094798848, 2150618140770304,92476585387491328, 462382939977023488] |