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| n | a(n) |
|---|---|
| 1 | 24 |
| 2 | 116 |
| 3 | 448 |
| 4 | 1472 |
| 5 | 4444 |
| 6 | 12774 |
| 7 | 35650 |
| 8 | 97884 |
| 9 | 266054 |
| 10 | 720836 |
| 11 | 1948936 |
| 12 | 5282998 |
| 13 | 14342514 |
| 14 | 39132978 |
| 15 | 107104716 |
| 16 | 294823440 |
| 17 | 814517876 |
| 18 | 2262919142 |
| 19 | 6309912984 |
| 20 | 17683751676 |
| 21 | 49727073362 |
| 22 | 140446174060 |
| 23 | 397854724286 |
| 24 | 1131186110662 |
[24,116,448,1472,4444,12774,35650,97884,266054, 720836,1948936,5282998,14342514,39132978, 107104716,294823440,814517876,2262919142, 6309912984,17683751676,49727073362,140446174060, 397854724286,1131186110662] |