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A074611 as a simple table

n a(n)
0 2
1 9
2 41
3 189
4 881
5 4149
6 19721
7 94509
8 456161
9 2215269
10 10814201
11 53022429
12 260917841
13 1287811989
14 6371951081
15 31591319949
16 156882857921
17 780119322309
18 3883416742361
19 19348364235069
20 96466943268401
21 481235204714229

[2,9,41,189,881,4149,19721,94509,456161,2215269,
 10814201,53022429,260917841,1287811989,6371951081,
 31591319949,156882857921,780119322309,
 3883416742361,19348364235069,96466943268401,
 481235204714229]

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Last modified April 23 03:26 EDT 2019. Contains 322380 sequences. (Running on oeis4.)