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A027943 as a simple table

n a(n)
2 1
3 22
4 155
5 709
6 2587
7 8273
8 24416
9 68595
10 187030
11 500950
12 1327986
13 3499982
14 9195035
15 24115804
16 63192397
17 165512723
18 433410661
19 1134800215
20 2971089810
21 7778591025

[1,22,155,709,2587,8273,24416,68595,187030,500950,
 1327986,3499982,9195035,24115804,63192397,
 165512723,433410661,1134800215,2971089810,
 7778591025]

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Last modified April 20 02:06 EDT 2019. Contains 322291 sequences. (Running on oeis4.)