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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 5 |
| 2 | 44 |
| 3 | 213 |
| 4 | 901 |
| 5 | 3729 |
| 6 | 15132 |
| 7 | 60689 |
| 8 | 244237 |
| 9 | 978368 |
| 10 | 3912197 |
| 11 | 15656416 |
| 12 | 62651132 |
| 13 | 250646797 |
| 14 | 1002647129 |
| 15 | 4010646957 |
[1,5,44,213,901,3729,15132,60689,244237,978368, 3912197,15656416,62651132,250646797,1002647129, 4010646957] |