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A207948 as a simple table

n a(n)
1 20
2 400
3 2340
4 18330
5 133812
6 1007146
7 7513176
8 56114310
9 418757982
10 3126019338
11 23335656728
12 174203347410
13 1300429210274
14 9707701033916
15 72467964696512
16 540973578440920
17 4038369684995910
18 30146442775842786
19 225043284353552098

[20,400,2340,18330,133812,1007146,7513176,
 56114310,418757982,3126019338,23335656728,
 174203347410,1300429210274,9707701033916,
 72467964696512,540973578440920,4038369684995910,
 30146442775842786,225043284353552098]

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Last modified April 19 21:09 EDT 2024. Contains 371798 sequences. (Running on oeis4.)