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A272507 as a simple table

n a(n)
0 1
1 5
2 20
3 57
4 332
5 1328
6 5329
7 21333
8 85513
9 346804
10 1382669
11 5513932
12 22072048
13 88358301
14 353454697
15 1414085800 

[1,5,20,57,332,1328,5329,21333,85513,346804,
 1382669,5513932,22072048,88358301,353454697,
 1414085800]

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Last modified August 12 04:50 EDT 2024. Contains 375085 sequences. (Running on oeis4.)