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A207698 as a simple table

n a(n)
1 25
2 625
3 1250
4 2500
5 10000
6 40000
7 145200
8 527076
9 2056032
10 8020224
11 29854944
12 111133764
13 429565416
14 1660399504
15 6232977072
16 23397985296
17 90031551120
18 346426416400
19 1306080208880
20 4924120769296
21 18891767424072
22 72479716304004

[25,625,1250,2500,10000,40000,145200,527076,
 2056032,8020224,29854944,111133764,429565416,
 1660399504,6232977072,23397985296,90031551120,
 346426416400,1306080208880,4924120769296,
 18891767424072,72479716304004]

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Last modified October 20 00:57 EDT 2021. Contains 348099 sequences. (Running on oeis4.)