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A097928 as a simple table

n a(n)
1 0
2 1
3 2
4 10
5 130
6 11950
7 175850
8 749470
9 1181729
10 11435450
11 916821671
12 956613659
13 1136307905
14 46746179770
15 77887660577
16 635913760790
17 53903615484947
18 55988454554339
19 534479689454189
20 1956592840355065

[0,1,2,10,130,11950,175850,749470,1181729,
 11435450,916821671,956613659,1136307905,
 46746179770,77887660577,635913760790,
 53903615484947,55988454554339,534479689454189,
 1956592840355065]

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Last modified August 11 15:12 EDT 2020. Contains 336428 sequences. (Running on oeis4.)