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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 5 |
| 2 | 24 |
| 3 | 88 |
| 4 | 312 |
| 5 | 1144 |
| 6 | 4344 |
| 7 | 16888 |
| 8 | 66552 |
| 9 | 264184 |
| 10 | 1052664 |
| 11 | 4202488 |
| 12 | 16793592 |
| 13 | 67141624 |
| 14 | 268500984 |
| 15 | 1073872888 |
[1,5,24,88,312,1144,4344,16888,66552,264184, 1052664,4202488,16793592,67141624,268500984, 1073872888] |