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| n | a(n) |
|---|---|
| 1 | 576 |
| 2 | 1400 |
| 3 | 3240 |
| 4 | 8224 |
| 5 | 19952 |
| 6 | 52328 |
| 7 | 131120 |
| 8 | 352000 |
| 9 | 903544 |
| 10 | 2468016 |
| 11 | 6458176 |
| 12 | 17881160 |
| 13 | 47552704 |
| 14 | 133129216 |
| 15 | 359039112 |
| 16 | 1014613904 |
| 17 | 2770351216 |
| 18 | 7892016840 |
| 19 | 21785349232 |
| 20 | 62495913056 |
| 21 | 174180409272 |
| 22 | 502718703312 |
| 23 | 1412888840448 |
[576,1400,3240,8224,19952,52328,131120,352000, 903544,2468016,6458176,17881160,47552704, 133129216,359039112,1014613904,2770351216, 7892016840,21785349232,62495913056,174180409272, 502718703312,1412888840448] |