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A256020 as a simple table

n a(n)
1 1
2 1
3 17
4 1394
5 358258
6 224269508
7 290877551876
8 698687879606152
9 2862524242746404744
10 18783884080901907930128
11 187857624693099981209210128
12 2750611340756369924865254694176
13 57039427373264843131930786593127712
14 1629160124635190449534207126672913710144

[1,1,17,1394,358258,224269508,290877551876,
 698687879606152,2862524242746404744,
 18783884080901907930128,
 187857624693099981209210128,
 2750611340756369924865254694176,
 57039427373264843131930786593127712,
 1629160124635190449534207126672913710144]

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Last modified March 26 10:18 EDT 2019. Contains 321491 sequences. (Running on oeis4.)