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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 3 |
| 3 | 34 |
| 4 | 602 |
| 5 | 14872 |
| 6 | 472138 |
| 7 | 18323359 |
| 8 | 840503724 |
| 9 | 44489123726 |
| 10 | 2668985463839 |
| 11 | 178960530393633 |
| 12 | 13263068003965046 |
| 13 | 1076580864432281157 |
| 14 | 94987639225399100006 |
| 15 | 9051397653144246683937 |
| 16 | 926407121115738135640677 |
| 17 | 101357200280211387377806719 |
| 18 | 11804887470887800839909147484 |
[1,3,34,602,14872,472138,18323359,840503724, 44489123726,2668985463839,178960530393633, 13263068003965046,1076580864432281157, 94987639225399100006,9051397653144246683937, 926407121115738135640677, 101357200280211387377806719, 11804887470887800839909147484] |