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A272420 as a simple table

n a(n)
0 1
1 5
2 24
3 89
4 297
5 1145
6 4461
7 17661
8 70037
9 278116
10 1105688
11 4386052
12 17391896
13 68794424
14 272505548
15 1086983752 

[1,5,24,89,297,1145,4461,17661,70037,278116,
 1105688,4386052,17391896,68794424,272505548,
 1086983752]

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Last modified April 25 05:18 EDT 2024. Contains 371964 sequences. (Running on oeis4.)