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A221514 as a simple table

n a(n)
1 0
2 6
3 31
4 252
5 1765
6 12872
7 92934
8 672526
9 4864004
10 35184566
11 254499831
12 1840896185
13 13315870072
14 96318591951
15 696707724524
16 5039542943168
17 36452864937683
18 263676961336509
19 1907272308179486
20 13796001136950442

[0,6,31,252,1765,12872,92934,672526,4864004,
 35184566,254499831,1840896185,13315870072,
 96318591951,696707724524,5039542943168,
 36452864937683,263676961336509,1907272308179486,
 13796001136950442]

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Last modified May 29 16:43 EDT 2020. Contains 334704 sequences. (Running on oeis4.)