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| n | a(n) |
|---|---|
| 1 | 16 |
| 2 | 256 |
| 3 | 2500 |
| 4 | 16900 |
| 5 | 87616 |
| 6 | 372100 |
| 7 | 1352569 |
| 8 | 4338889 |
| 9 | 12559936 |
| 10 | 33362176 |
| 11 | 82373776 |
| 12 | 190992400 |
| 13 | 419266576 |
| 14 | 877225924 |
| 15 | 1759047481 |
| 16 | 3396208729 |
| 17 | 6338070544 |
| 18 | 11471266816 |
| 19 | 20192978404 |
| 20 | 34657779556 |
| 21 | 58123423744 |
| 22 | 95427859396 |
[16,256,2500,16900,87616,372100,1352569,4338889, 12559936,33362176,82373776,190992400,419266576, 877225924,1759047481,3396208729,6338070544, 11471266816,20192978404,34657779556,58123423744, 95427859396] |