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A025986 as a simple table

n a(n)
0 1
1 20
2 257
3 2704
4 25389
5 221676
6 1841449
7 14758568
8 115171397
9 880623172
10 6627177921
11 49248518592
12 362296167325
13 2643446894108
14 19158543110873
15 138087153497176
16 990728497913973
17 7081081591668084

[1,20,257,2704,25389,221676,1841449,14758568,
 115171397,880623172,6627177921,49248518592,
 362296167325,2643446894108,19158543110873,
 138087153497176,990728497913973,7081081591668084]

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Last modified March 28 04:13 EDT 2024. Contains 371235 sequences. (Running on oeis4.)