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| n | a(n) |
|---|---|
| 1 | 8 |
| 2 | 656 |
| 3 | 9392 |
| 4 | 77236 |
| 5 | 408644 |
| 6 | 1668072 |
| 7 | 5532212 |
| 8 | 15837692 |
| 9 | 40185476 |
| 10 | 92896600 |
| 11 | 198499032 |
| 12 | 397892044 |
| 13 | 754772008 |
| 14 | 1366836516 |
| 15 | 2376338664 |
| 16 | 3988754296 |
| 17 | 6488751232 |
| 18 | 10269159692 |
| 19 | 15853887820 |
| 20 | 23940629936 |
| 21 | 35432070592 |
| 22 | 51496627304 |
[8,656,9392,77236,408644,1668072,5532212,15837692, 40185476,92896600,198499032,397892044,754772008, 1366836516,2376338664,3988754296,6488751232, 10269159692,15853887820,23940629936,35432070592, 51496627304] |