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A172894 as a simple table

n a(n)
0 1
1 1
2 7
3 406
4 132724
5 164176640
6 602351808741
7 5562418293759978
8 114601242382721619224
9 4801114002903931560293544
10 379957050243738294456427057200
11 53499490664883668314419655562118240

[1,1,7,406,132724,164176640,602351808741,
 5562418293759978,114601242382721619224,
 4801114002903931560293544,
 379957050243738294456427057200,
 53499490664883668314419655562118240]

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Last modified February 24 03:22 EST 2020. Contains 332195 sequences. (Running on oeis4.)