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A053293 formatted as a simple table:

n a(n)
0 1
1 6
2 2016
3 33784128
4 27811094169600
5 1122211189922928537600
6 2218959336124989671614429593600
7 214992513152176999576908105619651923148800 

[1,6,2016,33784128,27811094169600,
 1122211189922928537600,
 2218959336124989671614429593600,
 214992513152176999576908105619651923148800]

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Last modified December 8 08:31 EST 2009. Contains 170430 sequences.

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