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A007017 as a simple table

n a(n)
0 1
1 3
2 12
3 65
4 480
5 4851
6 67256
7 1281258
8 33576120
9 1211321683
10 60197760876
11 4122762095127
12 389255776509600
13 50680509287223315
14 9101288287232978112
15 2254758094831392182844

[1,3,12,65,480,4851,67256,1281258,33576120,
 1211321683,60197760876,4122762095127,
 389255776509600,50680509287223315,
 9101288287232978112,2254758094831392182844]

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Last modified September 19 00:22 EDT 2021. Contains 347549 sequences. (Running on oeis4.)