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A018951 as a simple table

n a(n)
2 2
3 16
4 34
5 261
6 1054
7 7154
8 40978
9 273252
10 1750672
11 11774812
12 79284286
13 546309289
14 3803238482
15 26854369810
16 191472135408 

[2,16,34,261,1054,7154,40978,273252,1750672,
 11774812,79284286,546309289,3803238482,
 26854369810,191472135408]

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Last modified March 22 01:15 EDT 2023. Contains 361413 sequences. (Running on oeis4.)