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A250018 as a simple table

n a(n)
1 20
2 1612
3 35440
4 375756
5 2499284
6 12088256
7 46481536
8 150444840
9 425961012
10 1083934148
11 2528257072
12 5485610260
13 11197641780
14 21695822168
15 40183275392
16 71552257168
17 123070684884
18 205276219260
19 333121856624
20 527422812316

[20,1612,35440,375756,2499284,12088256,46481536,
 150444840,425961012,1083934148,2528257072,
 5485610260,11197641780,21695822168,40183275392,
 71552257168,123070684884,205276219260,
 333121856624,527422812316]

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Last modified April 25 11:16 EDT 2024. Contains 371967 sequences. (Running on oeis4.)