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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 19 |
| 3 | 223 |
| 4 | 619 |
| 5 | 523 |
| 6 | 16285 |
| 7 | 141433 |
| 8 | 2231968 |
| 9 | 20520962 |
| 10 | 138309075 |
| 11 | 1507636982 |
| 12 | 428685674 |
[2,19,223,619,523,16285,141433,2231968,20520962, 138309075,1507636982,428685674] |