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A186266 as a simple table

n a(n)
0 1
1 3
2 18
3 140
4 1260
5 12474
6 132132
7 1472328
8 17065620
9 204155380
10 2506399896
11 31443925968
12 401783498480
13 5215458874500
14 68633685693000
15 914099013896400
16 12304253831789700
17 167193096184907100
18 2291164651422801000
19 31637804708163654000
20 439903041116118980400

[1,3,18,140,1260,12474,132132,1472328,17065620,
 204155380,2506399896,31443925968,401783498480,
 5215458874500,68633685693000,914099013896400,
 12304253831789700,167193096184907100,
 2291164651422801000,31637804708163654000,
 439903041116118980400]

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Last modified May 29 08:10 EDT 2024. Contains 372926 sequences. (Running on oeis4.)