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A318004 as a simple table

n a(n)
0 1
1 1
2 3
3 23
4 249
5 3601
6 65163
7 1420103
8 36240369
9 1060638241
10 35030837523
11 1289122462583
12 52311218246889
13 2320745189970481
14 111753587921091483
15 5805372695984119463
16 323619830261141155809
17 19269740737912396000321
18 1220661620760214878827043
19 81966845938603736180310743
20 5815923258824904181135143129

[1,1,3,23,249,3601,65163,1420103,36240369,
 1060638241,35030837523,1289122462583,
 52311218246889,2320745189970481,
 111753587921091483,5805372695984119463,
 323619830261141155809,19269740737912396000321,
 1220661620760214878827043,
 81966845938603736180310743,
 5815923258824904181135143129]

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Last modified June 28 12:59 EDT 2022. Contains 354907 sequences. (Running on oeis4.)