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A134356 as a simple table

n a(n)
1 1
2 4
3 42
4 1008
5 51480
6 5353920
7 1100473920
8 437480709120
9 330886851724800
10 470053968773760000
11 1241242628123282400000
12 6040838558884497984000000
13 53797620867616662708672000000
14 871394214986903051252166758400000

[1,4,42,1008,51480,5353920,1100473920,
 437480709120,330886851724800,470053968773760000,
 1241242628123282400000,6040838558884497984000000,
 53797620867616662708672000000,
 871394214986903051252166758400000]

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Last modified November 17 10:07 EST 2018. Contains 317275 sequences. (Running on oeis4.)