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A240043 as a simple table

n a(n)
1 6
2 20
3 72
4 346
5 1496
6 8567
7 46381
8 268672
9 1556758
10 9438166
11 56174788
12 346760638
13 2098659043
14 13032771483
15 79558734990
16 494814764391
17 3034462087200
18 18868201942704
19 116012171614159
20 720835003158134
21 4439604572498702

[6,20,72,346,1496,8567,46381,268672,1556758,
 9438166,56174788,346760638,2098659043,13032771483,
 79558734990,494814764391,3034462087200,
 18868201942704,116012171614159,720835003158134,
 4439604572498702]

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Last modified August 11 10:15 EDT 2022. Contains 356065 sequences. (Running on oeis4.)