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A138442 as a simple table

n a(n)
1 20
2 240
3 5200
4 39200
5 590480
6 1608880
7 8045760
8 15681840
9 49345120
10 198274160
11 295834240
12 855241680
13 1583367520
14 2107120400
15 3593071040
16 7388119440
17 14060176720
18 17173456880
19 30152792560
20 42700092960
21 50444740320

[20,240,5200,39200,590480,1608880,8045760,
 15681840,49345120,198274160,295834240,855241680,
 1583367520,2107120400,3593071040,7388119440,
 14060176720,17173456880,30152792560,42700092960,
 50444740320]

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Last modified April 23 08:33 EDT 2024. Contains 371905 sequences. (Running on oeis4.)