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A089943 as a simple table

n a(n)
0 1
1 3
2 20
3 617
4 315653
5 41373247568
6 355393490465494856466
7 13111705528158638560001549984013213785610
8 8923364382984350190045623219438187007104891998452120469899352728663188707599765

[1,3,20,617,315653,41373247568,
 355393490465494856466,
 13111705528158638560001549984013213785610,
 89233643829843501900456232194381870071048919984521\
 20469899352728663188707599765]

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Last modified November 26 17:52 EST 2021. Contains 349343 sequences. (Running on oeis4.)