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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 56 |
| 3 | 4304 |
| 4 | 647552 |
| 5 | 161009408 |
| 6 | 59798825984 |
| 7 | 31018594543616 |
| 8 | 21421107883900928 |
| 9 | 19000925396453752832 |
| 10 | 21053097631093130264576 |
| 11 | 28496291901064818145624064 |
| 12 | 46267687031143770070546644992 |
| 13 | 88754774204916230754873248841728 |
| 14 | 198588172996269363811346709494104064 |
[1,2,56,4304,647552,161009408,59798825984, 31018594543616,21421107883900928, 19000925396453752832,21053097631093130264576, 28496291901064818145624064, 46267687031143770070546644992, 88754774204916230754873248841728, 198588172996269363811346709494104064] |