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A305472 as a simple table

n a(n)
0 1
1 3
2 16
3 138
4 1624
5 24084
6 430264
7 8987376
8 214836496
9 5782610640
10 173048646208
11 5699040103584
12 204819346436608
13 7976556430820544
14 334605731401589632
15 15041304800209892352
16 721313418947271653632
17 36756901756710434550528

[1,3,16,138,1624,24084,430264,8987376,214836496,
 5782610640,173048646208,5699040103584,
 204819346436608,7976556430820544,
 334605731401589632,15041304800209892352,
 721313418947271653632,36756901756710434550528]

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Last modified June 12 14:45 EDT 2021. Contains 344957 sequences. (Running on oeis4.)