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A222187 as a simple table

n a(n)
1 3
2 7
3 13
4 34
5 78
6 237
7 687
8 2299
9 7685
10 27190
11 96909
12 353384
13 1296858
14 4808707
15 17920860
16 67169299
17 252745368
18 954677597
19 3617214681
20 13744852240
21 52359294790
22 199915018057
23 764884036743
24 2932046213314
25 11259024569838
26 43303903226962
27 166800088109829

[3,7,13,34,78,237,687,2299,7685,27190,96909,
 353384,1296858,4808707,17920860,67169299,
 252745368,954677597,3617214681,13744852240,
 52359294790,199915018057,764884036743,
 2932046213314,11259024569838,43303903226962,
 166800088109829]

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Last modified November 15 11:18 EST 2019. Contains 329144 sequences. (Running on oeis4.)