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| n | a(n) |
|---|---|
| 1 | 13 |
| 2 | 169 |
| 3 | 624 |
| 4 | 2304 |
| 5 | 5952 |
| 6 | 15376 |
| 7 | 32860 |
| 8 | 70225 |
| 9 | 132765 |
| 10 | 251001 |
| 11 | 434868 |
| 12 | 753424 |
| 13 | 1222144 |
| 14 | 1982464 |
| 15 | 3053952 |
| 16 | 4704561 |
| 17 | 6951645 |
| 18 | 10272025 |
| 19 | 14666080 |
| 20 | 20939776 |
| 21 | 29048448 |
| 22 | 40297104 |
| 23 | 54548364 |
| 24 | 73839649 |
| 25 | 97865677 |
| 26 | 129709321 |
| 27 | 168784980 |
[13,169,624,2304,5952,15376,32860,70225,132765, 251001,434868,753424,1222144,1982464,3053952, 4704561,6951645,10272025,14666080,20939776, 29048448,40297104,54548364,73839649,97865677, 129709321,168784980] |