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| n | a(n) |
|---|---|
| 1 | 512 |
| 2 | 2384 |
| 3 | 10240 |
| 4 | 37200 |
| 5 | 116056 |
| 6 | 358324 |
| 7 | 1029664 |
| 8 | 2800912 |
| 9 | 7536024 |
| 10 | 19539824 |
| 11 | 49071028 |
| 12 | 122137716 |
| 13 | 297265144 |
| 14 | 708589765 |
| 15 | 1676189792 |
| 16 | 3907023789 |
| 17 | 8978272228 |
| 18 | 20497994769 |
| 19 | 46321914076 |
| 20 | 103638618227 |
| 21 | 230617227832 |
| 22 | 509410016859 |
[512,2384,10240,37200,116056,358324,1029664, 2800912,7536024,19539824,49071028,122137716, 297265144,708589765,1676189792,3907023789, 8978272228,20497994769,46321914076,103638618227, 230617227832,509410016859] |