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A155380 as a simple table

n a(n)
5 1
6 4
7 10
8 19
9 40
10 120
11 445
12 2107
13 10099
14 50833
15 296830
16 2080084
17 17252149
18 164656985
19 1767665953
20 21481633518
21 300312864497

[1,4,10,19,40,120,445,2107,10099,50833,296830,
 2080084,17252149,164656985,1767665953,21481633518,
 300312864497]

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Last modified January 19 18:36 EST 2022. Contains 350466 sequences. (Running on oeis4.)