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A155421 as a simple table

n a(n)
5 1
6 4
7 10
8 22
9 55
10 192
11 618
12 2255
13 11708
14 67218
15 421461
16 2956054
17 24412206
18 225564175

[1,4,10,22,55,192,618,2255,11708,67218,421461,
 2956054,24412206,225564175]

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Last modified October 3 10:58 EDT 2022. Contains 357231 sequences. (Running on oeis4.)