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A161557 as a simple table

n a(n)
-1 1
0 744
1 393768
2 64481280
3 3457199880
4 101229281280
5 1999215843600
6 29764163100672
7 357255952575480
8 3613417979904000
9 31764402297844200
10 248241326405529600
11 1754542937994231528
12 11366078355915079680
13 68208141565173995280

[1,744,393768,64481280,3457199880,101229281280,
 1999215843600,29764163100672,357255952575480,
 3613417979904000,31764402297844200,
 248241326405529600,1754542937994231528,
 11366078355915079680,68208141565173995280]

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Last modified October 15 04:33 EDT 2019. Contains 328026 sequences. (Running on oeis4.)