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A110051 as a simple table

n a(n)
0 1
1 4
2 25
3 119
4 599
5 2887
6 14039
7 67767
8 327607
9 1581751
10 7638967
11 36883895
12 178097591
13 859930039
14 4152135095
15 20048276919
16 96801746359
17 467400158647
18 2256808013239
19 10896832949687
20 52614565424567
21 254045594545591

[1,4,25,119,599,2887,14039,67767,327607,1581751,
 7638967,36883895,178097591,859930039,4152135095,
 20048276919,96801746359,467400158647,
 2256808013239,10896832949687,52614565424567,
 254045594545591]

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Last modified April 13 00:24 EDT 2021. Contains 342934 sequences. (Running on oeis4.)