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| n | a(n) |
|---|---|
| 1 | 4 |
| 2 | 164 |
| 3 | 528 |
| 4 | 1968 |
| 5 | 3844 |
| 6 | 8836 |
| 7 | 14144 |
| 8 | 26176 |
| 9 | 37540 |
| 10 | 61188 |
| 11 | 82192 |
| 12 | 123120 |
| 13 | 157924 |
| 14 | 223268 |
| 15 | 276608 |
| 16 | 374272 |
| 17 | 452420 |
| 18 | 591524 |
| 19 | 700752 |
| 20 | 891760 |
| 21 | 1038980 |
| 22 | 1293700 |
| 23 | 1487744 |
| 24 | 1818112 |
| 25 | 2067172 |
[4,164,528,1968,3844,8836,14144,26176,37540,61188, 82192,123120,157924,223268,276608,374272,452420, 591524,700752,891760,1038980,1293700,1487744, 1818112,2067172] |