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A155355 as a simple table

n a(n)
4 1
5 4
6 13
7 28
8 49
9 171
10 1310
11 8460
12 42491
13 242978
14 2107793
15 27648766
16 373047925
17 4984501036
18 77677934468
19 1580716536075
20 41780194476260 

[1,4,13,28,49,171,1310,8460,42491,242978,2107793,
 27648766,373047925,4984501036,77677934468,
 1580716536075,41780194476260]

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Last modified April 24 20:08 EDT 2024. Contains 371963 sequences. (Running on oeis4.)