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| n | a(n) |
|---|---|
| 1 | 19 |
| 2 | 247 |
| 3 | 547 |
| 4 | 1783 |
| 5 | 3475 |
| 6 | 10987 |
| 7 | 23599 |
| 8 | 266899 |
| 9 | 387139 |
| 10 | 785695 |
| 11 | 2085835 |
| 12 | 2749195 |
[19,247,547,1783,3475,10987,23599,266899,387139, 785695,2085835,2749195] |