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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 19 |
| 3 | 37 |
| 4 | 379 |
| 5 | 1045 |
| 6 | 7867 |
| 7 | 26677 |
| 8 | 168283 |
| 9 | 648469 |
| 10 | 3677563 |
| 11 | 15350005 |
| 12 | 81546139 |
| 13 | 357846229 |
| 14 | 1825676731 |
| 15 | 8266908853 |
| 16 | 41129090011 |
| 17 | 189933449365 |
| 18 | 930257069563 |
| 19 | 4349059158133 |
| 20 | 21093686410267 |
| 21 | 99376751256661 |
| 22 | 479063106641467 |
| 23 | 2267844629261365 |
| 24 | 10890980548807771 |
[1,1,19,37,379,1045,7867,26677,168283,648469, 3677563,15350005,81546139,357846229,1825676731, 8266908853,41129090011,189933449365,930257069563, 4349059158133,21093686410267,99376751256661, 479063106641467,2267844629261365, 10890980548807771] |