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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 5 |
| 3 | 34 |
| 4 | 381 |
| 5 | 8401 |
| 6 | 334688 |
| 7 | 27151993 |
| 8 | 4091831133 |
| 9 | 1251353635162 |
| 10 | 737891198902325 |
| 11 | 864695662715974585 |
| 12 | 2033353960345783330704 |
| 13 | 9255876152303901497918425 |
| 14 | 87365856252845525476020365429 |
| 15 | 1563265999862817889675899566032954 |
| 16 | 59157049408983740505063226640565220029 |
| 17 | 4200428372739940183291465697348398947046393 |
| 18 | 634544126271277747190512917479290795324884131840 |
[1,5,34,381,8401,334688,27151993,4091831133, 1251353635162,737891198902325,864695662715974585, 2033353960345783330704,9255876152303901497918425, 87365856252845525476020365429, 1563265999862817889675899566032954, 59157049408983740505063226640565220029, 4200428372739940183291465697348398947046393, 634544126271277747190512917479290795324884131840] |