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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 45 |
| 2 | 225 |
| 3 | 637 |
| 4 | 1377 |
| 5 | 2541 |
| 6 | 4225 |
| 7 | 6525 |
| 8 | 9537 |
| 9 | 13357 |
| 10 | 18081 |
| 11 | 23805 |
| 12 | 30625 |
| 13 | 38637 |
| 14 | 47937 |
| 15 | 58621 |
| 16 | 70785 |
| 17 | 84525 |
| 18 | 99937 |
| 19 | 117117 |
| 20 | 136161 |
| 21 | 157165 |
| 22 | 180225 |
| 23 | 205437 |
| 24 | 232897 |
| 25 | 262701 |
| 26 | 294945 |
| 27 | 329725 |
| 28 | 367137 |
| 29 | 407277 |
| 30 | 450241 |
| 31 | 496125 |
[1,45,225,637,1377,2541,4225,6525,9537,13357, 18081,23805,30625,38637,47937,58621,70785,84525, 99937,117117,136161,157165,180225,205437,232897, 262701,294945,329725,367137,407277,450241,496125] |