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| n | a(n) |
|---|---|
| 13 | 1 |
| 14 | 10 |
| 15 | 77 |
| 16 | 415 |
| 17 | 1825 |
| 18 | 6692 |
| 19 | 21587 |
| 20 | 62225 |
| 21 | 164197 |
| 22 | 401173 |
| 23 | 919007 |
| 24 | 1989942 |
| 25 | 4102426 |
| 26 | 8100013 |
| 27 | 15388485 |
| 28 | 28249241 |
| 29 | 50273708 |
| 30 | 87007800 |
| 31 | 146783168 |
| 32 | 241958083 |
| 33 | 390411308 |
| 34 | 617752456 |
| 35 | 959909294 |
| 36 | 1466853260 |
| 37 | 2206861654 |
| 38 | 3272535062 |
| 39 | 4787597429 |
| 40 | 6916184121 |
| 41 | 9873403733 |
[1,10,77,415,1825,6692,21587,62225,164197,401173, 919007,1989942,4102426,8100013,15388485,28249241, 50273708,87007800,146783168,241958083,390411308, 617752456,959909294,1466853260,2206861654, 3272535062,4787597429,6916184121,9873403733] |