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A225609 as a simple table

n a(n)
0 0
1 1
2 4
3 33
4 532
5 17057
6 1092180
7 139816097
8 35794013012
9 18326674478241
10 18766550459731796
11 38433913668205196449
12 157425329151518944386900
13 1289628334843156860622681249
14 21129270795495611155960953970516
15 692363946716428521201685400328549537

[0,1,4,33,532,17057,1092180,139816097,35794013012,
 18326674478241,18766550459731796,
 38433913668205196449,157425329151518944386900,
 1289628334843156860622681249,
 21129270795495611155960953970516,
 692363946716428521201685400328549537]

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Last modified July 8 17:40 EDT 2020. Contains 335524 sequences. (Running on oeis4.)