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A308475 as a simple table

n a(n)
1 1
2 2
3 9
4 40
5 315
6 1896
7 21651
8 191360
9 2546487
10 28064080
11 488517183
12 5879603280
13 124673371719
14 1928346159572
15 42684093159480
16 754925802649360
17 20289814995554811
18 366300418631427144
19 11352374441063693655
20 250187625076714423520
21 7774760839170720287739

[1,2,9,40,315,1896,21651,191360,2546487,28064080,
 488517183,5879603280,124673371719,1928346159572,
 42684093159480,754925802649360,20289814995554811,
 366300418631427144,11352374441063693655,
 250187625076714423520,7774760839170720287739]

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Last modified April 19 18:58 EDT 2024. Contains 371798 sequences. (Running on oeis4.)