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| n | a(n) |
|---|---|
| 1 | 81 |
| 2 | 722 |
| 3 | 1494 |
| 4 | 2356 |
| 5 | 5358 |
| 6 | 10420 |
| 7 | 21288 |
| 8 | 49860 |
| 9 | 114312 |
| 10 | 228100 |
| 11 | 449256 |
| 12 | 1104660 |
| 13 | 2526024 |
| 14 | 5184100 |
| 15 | 9904296 |
| 16 | 25347060 |
| 17 | 57842184 |
| 18 | 121308100 |
| 19 | 226373736 |
| 20 | 597365460 |
| 21 | 1361119944 |
| 22 | 2899992100 |
| 23 | 5319604776 |
| 24 | 14353159860 |
| 25 | 32669044104 |
| 26 | 70376436100 |
[81,722,1494,2356,5358,10420,21288,49860,114312, 228100,449256,1104660,2526024,5184100,9904296, 25347060,57842184,121308100,226373736,597365460, 1361119944,2899992100,5319604776,14353159860, 32669044104,70376436100] |