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| n | a(n) |
|---|---|
| 1 | 48 |
| 2 | 238 |
| 3 | 714 |
| 4 | 1912 |
| 5 | 4946 |
| 6 | 12870 |
| 7 | 33484 |
| 8 | 89124 |
| 9 | 237726 |
| 10 | 649158 |
| 11 | 1771052 |
| 12 | 4937870 |
| 13 | 13708524 |
| 14 | 38836608 |
| 15 | 109246792 |
| 16 | 313321916 |
| 17 | 890240494 |
| 18 | 2577595902 |
| 19 | 7380219014 |
| 20 | 21526814774 |
| 21 | 62001807654 |
| 22 | 181885545056 |
| 23 | 526258853768 |
| 24 | 1550638116182 |
[48,238,714,1912,4946,12870,33484,89124,237726, 649158,1771052,4937870,13708524,38836608, 109246792,313321916,890240494,2577595902, 7380219014,21526814774,62001807654,181885545056, 526258853768,1550638116182] |