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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 36 |
| 2 | 576 |
| 3 | 3600 |
| 4 | 14400 |
| 5 | 44100 |
| 6 | 112896 |
| 7 | 254016 |
| 8 | 518400 |
| 9 | 980100 |
| 10 | 1742400 |
| 11 | 2944656 |
| 12 | 4769856 |
| 13 | 7452900 |
| 14 | 11289600 |
| 15 | 16646400 |
| 16 | 23970816 |
| 17 | 33802596 |
| 18 | 46785600 |
| 19 | 63680400 |
| 20 | 85377600 |
| 21 | 112911876 |
| 22 | 147476736 |
| 23 | 190440000 |
| 24 | 243360000 |
| 25 | 308002500 |
| 26 | 386358336 |
[0,36,576,3600,14400,44100,112896,254016,518400, 980100,1742400,2944656,4769856,7452900,11289600, 16646400,23970816,33802596,46785600,63680400, 85377600,112911876,147476736,190440000,243360000, 308002500,386358336] |