A035780 - OEIS

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A035780 as a simple table

n	a(n)
0	1
1	3698
2	2281666
3	564939762
4	75337937666
5	6297987950322
6	362379485902530
7	15295775774728050
8	496112377224088578
9	12810603157435946354
10	270825129557394211522
11	4795024968771774597362
12	72448989645639523846914

[1,3698,2281666,564939762,75337937666, 6297987950322,362379485902530,15295775774728050, 496112377224088578,12810603157435946354, 270825129557394211522,4795024968771774597362, 72448989645639523846914]