| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 4 |
| 2 | 20 |
| 3 | 48 |
| 4 | 88 |
| 5 | 140 |
| 6 | 204 |
| 7 | 280 |
| 8 | 368 |
| 9 | 468 |
| 10 | 580 |
| 11 | 704 |
| 12 | 840 |
| 13 | 988 |
| 14 | 1148 |
| 15 | 1320 |
| 16 | 1504 |
| 17 | 1700 |
| 18 | 1908 |
| 19 | 2128 |
| 20 | 2360 |
| 21 | 2604 |
| 22 | 2860 |
| 23 | 3128 |
| 24 | 3408 |
| 25 | 3700 |
| 26 | 4004 |
| 27 | 4320 |
| 28 | 4648 |
| 29 | 4988 |
| 30 | 5340 |
| 31 | 5704 |
| 32 | 6080 |
| 33 | 6468 |
| 34 | 6868 |
| 35 | 7280 |
| 36 | 7704 |
| 37 | 8140 |
| 38 | 8588 |
| 39 | 9048 |
| 40 | 9520 |
| 41 | 10004 |
| 42 | 10500 |
| 43 | 11008 |
| 44 | 11528 |
| 45 | 12060 |
[0,4,20,48,88,140,204,280,368,468,580,704,840,988, 1148,1320,1504,1700,1908,2128,2360,2604,2860,3128, 3408,3700,4004,4320,4648,4988,5340,5704,6080,6468, 6868,7280,7704,8140,8588,9048,9520,10004,10500, 11008,11528,12060] |