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A121221 as a simple table

n a(n)
1 2
2 2
3 4
4 15
5 35
6 137
7 306
8 1056
9 2510
10 8094
11 21568
12 66310
13 183338
14 545993
15 1538831 

[2,2,4,15,35,137,306,1056,2510,8094,21568,66310,
 183338,545993,1538831]

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Last modified April 23 11:07 EDT 2024. Contains 371905 sequences. (Running on oeis4.)