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A190584 as a simple table

n a(n)
1 4
2 27
3 119
4 497
5 2023
6 8149
7 32692
8 130938
9 524050
10 2096730
11 8387859
12 33553102
13 134215364
14 536866711
15 2147476180 

[4,27,119,497,2023,8149,32692,130938,524050,
 2096730,8387859,33553102,134215364,536866711,
 2147476180]

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Last modified June 29 07:33 EDT 2022. Contains 354910 sequences. (Running on oeis4.)