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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 3 |
| 3 | 217 |
| 4 | 3937 |
| 5 | 57337 |
| 6 | 917497 |
| 7 | 1040257 |
| 8 | 11010027 |
| 9 | 12189603 |
| 10 | 16252897 |
| 11 | 16646017 |
| 12 | 3612185689 |
| 13 | 4294434817 |
| 14 | 66571993057 |
| 15 | 68718821377 |
| 16 | 17590038552577 |
| 17 | 270545999761249 |
| 18 | 281472829095937 |
| 19 | 16138807601873739769 |
| 20 | 16140901064495857657 |
| 21 | 292842062170139131777 |
| 22 | 1208766717309082486038529 |
[1,3,217,3937,57337,917497,1040257,11010027, 12189603,16252897,16646017,3612185689,4294434817, 66571993057,68718821377,17590038552577, 270545999761249,281472829095937, 16138807601873739769,16140901064495857657, 292842062170139131777,1208766717309082486038529] |