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| n | a(n) |
|---|---|
| 1 | 16 |
| 2 | 256 |
| 3 | 2297 |
| 4 | 13599 |
| 5 | 61545 |
| 6 | 230619 |
| 7 | 748950 |
| 8 | 2171533 |
| 9 | 5738616 |
| 10 | 14032520 |
| 11 | 32116856 |
| 12 | 69421945 |
| 13 | 142742110 |
| 14 | 280837253 |
| 15 | 531285626 |
| 16 | 970419825 |
| 17 | 1717396652 |
| 18 | 2953706474 |
| 19 | 4949721932 |
| 20 | 8100222189 |
| 21 | 12971210226 |
| 22 | 20360769871 |
| 23 | 31377189150 |
| 24 | 47538110053 |
[16,256,2297,13599,61545,230619,748950,2171533, 5738616,14032520,32116856,69421945,142742110, 280837253,531285626,970419825,1717396652, 2953706474,4949721932,8100222189,12971210226, 20360769871,31377189150,47538110053] |