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A155257 as a simple table

n a(n)
3 1
4 4
5 13
6 28
7 111
8 502
9 2990
10 22461
11 175998
12 1776694
13 23271927
14 358397754
15 6862062854
16 158641875413
17 4463737522965
18 156583615357383 

[1,4,13,28,111,502,2990,22461,175998,1776694,
 23271927,358397754,6862062854,158641875413,
 4463737522965,156583615357383]

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Last modified July 14 12:15 EDT 2024. Contains 374318 sequences. (Running on oeis4.)