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A280176 as a simple table

n a(n)
1 3
2 41
3 279
4 1633
5 8759
6 43094
7 202693
8 919058
9 4057457
10 17554353
11 74755040
12 314269010
13 1307053311
14 5386675841
15 22025521567
16 89442385391
17 361014889345
18 1449314491017
19 5790282988659
20 23032601187928
21 91257530191537

[3,41,279,1633,8759,43094,202693,919058,4057457,
 17554353,74755040,314269010,1307053311,5386675841,
 22025521567,89442385391,361014889345,
 1449314491017,5790282988659,23032601187928,
 91257530191537]

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Last modified August 15 15:28 EDT 2022. Contains 356148 sequences. (Running on oeis4.)