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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 3 |
| 3 | 26 |
| 4 | 654 |
| 5 | 45084 |
| 6 | 7934924 |
| 7 | 3381663872 |
| 8 | 3365978050576 |
| 9 | 7632454575648720 |
| 10 | 38732162420625498608 |
| 11 | 434139952882119137261024 |
| 12 | 10640704036253473615712677216 |
| 13 | 565765176687479152385624223741568 |
| 14 | 64834956096893473256448986077914291328 |
[1,1,3,26,654,45084,7934924,3381663872, 3365978050576,7632454575648720, 38732162420625498608,434139952882119137261024, 10640704036253473615712677216, 565765176687479152385624223741568, 64834956096893473256448986077914291328] |