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A215117 as a simple table

n a(n)
1 1
2 1
3 1
4 49
5 721
6 17281
7 452065
8 13511953
9 443435185
10 15816390241
11 606861668161
12 24867738772849
13 1082158542264721
14 49785517156216897
15 2412544311495241633
16 122762020478952148177
17 6542028190536528941425
18 364254737003651267997985
19 21146448814786605196994305

[1,1,1,49,721,17281,452065,13511953,443435185,
 15816390241,606861668161,24867738772849,
 1082158542264721,49785517156216897,
 2412544311495241633,122762020478952148177,
 6542028190536528941425,364254737003651267997985,
 21146448814786605196994305]

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Last modified June 15 17:43 EDT 2019. Contains 324142 sequences. (Running on oeis4.)