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A308380 as a simple table

n a(n)
1 1
2 2
3 9
4 56
5 455
6 4224
7 48391
8 609104
9 8814753
10 140512400
11 2483071481
12 47387543928
13 989622741367
14 22107721563368
15 530909919285495
16 13581037512256544
17 369627228319635329
18 10633498287935101920
19 323389433072136213289
20 10342303284390333962600
21 347514522157550224614711

[1,2,9,56,455,4224,48391,609104,8814753,140512400,
 2483071481,47387543928,989622741367,
 22107721563368,530909919285495,13581037512256544,
 369627228319635329,10633498287935101920,
 323389433072136213289,10342303284390333962600,
 347514522157550224614711]

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Last modified August 9 21:56 EDT 2020. Contains 336326 sequences. (Running on oeis4.)