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A000745 as a simple table

n a(n)
0 1
1 5
2 18
3 57
4 180
5 617
6 2400
7 10717
8 54544
9 312353
10 1988104
11 13921501
12 106350816
13 880162337
14 7844596536
15 74910367309
16 763030711936
17 8257927397569
18 94628877364936
19 1144609672707741
20 14573622985067744

[1,5,18,57,180,617,2400,10717,54544,312353,
 1988104,13921501,106350816,880162337,7844596536,
 74910367309,763030711936,8257927397569,
 94628877364936,1144609672707741,14573622985067744]

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Last modified September 29 21:59 EDT 2020. Contains 337432 sequences. (Running on oeis4.)