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A027006 as a simple table

n a(n)
2 1
3 34
4 281
5 1397
6 5353
7 17643
8 53062
9 150833
10 414210
11 1114160
12 2960806
13 7814074
14 20544191
15 53902532
16 141273663
17 370060623
18 969088727
19 2537431693
20 6643486220
21 17393369595
22 45537037936
23 119218243314
24 312118286876
25 817137321092
26 2139294503373
27 5600747154678

[1,34,281,1397,5353,17643,53062,150833,414210,
 1114160,2960806,7814074,20544191,53902532,
 141273663,370060623,969088727,2537431693,
 6643486220,17393369595,45537037936,119218243314,
 312118286876,817137321092,2139294503373,
 5600747154678]

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Last modified June 12 11:10 EDT 2024. Contains 373331 sequences. (Running on oeis4.)