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| n | a(n) |
|---|---|
| 1 | 170864 |
| 2 | 348876 |
| 3 | 698304 |
| 4 | 1593940 |
| 5 | 3548456 |
| 6 | 8787924 |
| 7 | 21123784 |
| 8 | 55565636 |
| 9 | 141304528 |
| 10 | 389137436 |
| 11 | 1033108024 |
| 12 | 2948180108 |
| 13 | 8099212024 |
| 14 | 23769869420 |
| 15 | 67153607264 |
| 16 | 201544634004 |
| 17 | 582902960392 |
| 18 | 1781509519796 |
| 19 | 5256618469672 |
[170864,348876,698304,1593940,3548456,8787924, 21123784,55565636,141304528,389137436,1033108024, 2948180108,8099212024,23769869420,67153607264, 201544634004,582902960392,1781509519796, 5256618469672] |