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| n | a(n) |
|---|---|
| 1 | 4 |
| 2 | 80 |
| 3 | 336 |
| 4 | 880 |
| 5 | 1820 |
| 6 | 3264 |
| 7 | 5320 |
| 8 | 8096 |
| 9 | 11700 |
| 10 | 16240 |
| 11 | 21824 |
| 12 | 28560 |
| 13 | 36556 |
| 14 | 45920 |
| 15 | 56760 |
| 16 | 69184 |
| 17 | 83300 |
| 18 | 99216 |
| 19 | 117040 |
| 20 | 136880 |
| 21 | 158844 |
| 22 | 183040 |
| 23 | 209576 |
| 24 | 238560 |
| 25 | 270100 |
| 26 | 304304 |
| 27 | 341280 |
| 28 | 381136 |
| 29 | 423980 |
| 30 | 469920 |
[4,80,336,880,1820,3264,5320,8096,11700,16240, 21824,28560,36556,45920,56760,69184,83300,99216, 117040,136880,158844,183040,209576,238560,270100, 304304,341280,381136,423980,469920] |