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| n | a(n) |
|---|---|
| 0 | 15 |
| 1 | 31 |
| 2 | 46 |
| 3 | 169 |
| 4 | 891 |
| 5 | 1060 |
| 6 | 7251 |
| 7 | 8311 |
| 8 | 48806 |
| 9 | 154729 |
| 10 | 203535 |
| 11 | 561799 |
| 12 | 17057505 |
| 13 | 34676809 |
| 14 | 51734314 |
| 15 | 189879751 |
| 16 | 1001133069 |
| 17 | 1191012820 |
| 18 | 8147209989 |
| 19 | 9338222809 |
| 20 | 54838324034 |
| 21 | 173853194911 |
| 22 | 228691518945 |
[15,31,46,169,891,1060,7251,8311,48806,154729, 203535,561799,17057505,34676809,51734314, 189879751,1001133069,1191012820,8147209989, 9338222809,54838324034,173853194911,228691518945] |