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| n | a(n) |
|---|---|
| 1 | 23 |
| 2 | 191 |
| 3 | 1531 |
| 4 | 11314 |
| 5 | 80422 |
| 6 | 555789 |
| 7 | 3761534 |
| 8 | 25063389 |
| 9 | 164926651 |
| 10 | 1074440360 |
| 11 | 6941695514 |
| 12 | 44537043804 |
| 13 | 284052377508 |
| 14 | 1802408061740 |
| 15 | 11386034886784 |
| 16 | 71645923776799 |
| 17 | 449267054051740 |
| 18 | 2808501899850347 |
| 19 | 17508131088788801 |
[23,191,1531,11314,80422,555789,3761534,25063389, 164926651,1074440360,6941695514,44537043804, 284052377508,1802408061740,11386034886784, 71645923776799,449267054051740,2808501899850347, 17508131088788801] |