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A156073 as a simple table

n a(n)
-1 1
0 2
1 5
2 20
3 130
4 1120
5 12080
6 156320
7 2360080
8 40721920
9 790465280
10 17048837120
11 404482209280
12 10468697374720
13 293526944276480
14 8863147657809920
15 286741939970836480
16 9895168120066539520
17 362814031120908615680
18 14085379571459949854720
19 577210378447729271111680

[1,2,5,20,130,1120,12080,156320,2360080,40721920,
 790465280,17048837120,404482209280,10468697374720,
 293526944276480,8863147657809920,
 286741939970836480,9895168120066539520,
 362814031120908615680,14085379571459949854720,
 577210378447729271111680]

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Last modified August 20 10:22 EDT 2024. Contains 375325 sequences. (Running on oeis4.)