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A155258 as a simple table

n a(n)
4 1
5 7
6 25
7 90
8 688
9 4109
10 25041
11 287360
12 3402527
13 48602011
14 1011814868
15 22922047752 

[1,7,25,90,688,4109,25041,287360,3402527,48602011,
 1011814868,22922047752]

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Last modified July 14 16:00 EDT 2024. Contains 374322 sequences. (Running on oeis4.)