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A080253 as a simple table

n a(n)
0 1
1 3
2 17
3 147
4 1697
5 24483
6 423857
7 8560947
8 197613377
9 5131725123
10 148070287697
11 4699645934547
12 162723741209057
13 6103779096411363
14 246564971326084337
15 10671541841672056947
16 492664975795819140737
17 24166020791610523843203

[1,3,17,147,1697,24483,423857,8560947,197613377,
 5131725123,148070287697,4699645934547,
 162723741209057,6103779096411363,
 246564971326084337,10671541841672056947,
 492664975795819140737,24166020791610523843203]

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Last modified March 18 12:10 EDT 2019. Contains 321283 sequences. (Running on oeis4.)