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A204078 as a simple table

n a(n)
1 0
2 4
3 4
4 16
5 100
6 324
7 1296
8 5476
9 21316
10 85264
11 343396
12 1368900
13 5475600
14 21921124
15 87647044
16 350588176
17 1402502500
18 5609710404
19 22438841616
20 89756564836
21 359023862596
22 1436095450384
23 5744391388516
24 22977546380100
25 91910185520400

[0,4,4,16,100,324,1296,5476,21316,85264,343396,
 1368900,5475600,21921124,87647044,350588176,
 1402502500,5609710404,22438841616,89756564836,
 359023862596,1436095450384,5744391388516,
 22977546380100,91910185520400]

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Last modified April 23 03:30 EDT 2024. Contains 371906 sequences. (Running on oeis4.)