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A047830 as a simple table

n a(n)
0 2
1 4
2 14
3 26
4 62
5 134
6 393
7 1774
8 13682
9 41037
10 167073
11 334142
12 4677862
13 14033577
14 79464886
15 476789307
16 3488435822
17 34884358195

[2,4,14,26,62,134,393,1774,13682,41037,167073,
 334142,4677862,14033577,79464886,476789307,
 3488435822,34884358195]

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Last modified December 5 12:42 EST 2022. Contains 358586 sequences. (Running on oeis4.)