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A128481 as a simple table

n a(n)
0 2
1 20
2 306
3 7376
4 273956
5 15345156
6 1274990124
7 155024945978
8 27422185371264
9 6981850496603886
10 2547185424690611836

[2,20,306,7376,273956,15345156,1274990124,
 155024945978,27422185371264,6981850496603886,
 2547185424690611836]

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Last modified June 21 10:57 EDT 2024. Contains 373544 sequences. (Running on oeis4.)