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| n | a(n) |
|---|---|
| 1 | 18784 |
| 2 | 41844 |
| 3 | 110274 |
| 4 | 267424 |
| 5 | 805458 |
| 6 | 2004428 |
| 7 | 5955918 |
| 8 | 15032200 |
| 9 | 44965942 |
| 10 | 113000332 |
| 11 | 336562898 |
| 12 | 846777416 |
| 13 | 2514445286 |
| 14 | 6345831140 |
| 15 | 18852824906 |
| 16 | 47584208128 |
| 17 | 141289879158 |
| 18 | 356650318804 |
| 19 | 1058329372746 |
| 20 | 2672854730808 |
[18784,41844,110274,267424,805458,2004428,5955918, 15032200,44965942,113000332,336562898,846777416, 2514445286,6345831140,18852824906,47584208128, 141289879158,356650318804,1058329372746, 2672854730808] |