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A106434 as a simple table

n a(n)
1 0
2 2
3 6
4 22
5 78
6 278
7 990
8 3526
9 12558
10 44726
11 159294
12 567334
13 2020590
14 7196438
15 25630494
16 91284358
17 325114062
18 1157910902
19 4123960830
20 14687704294
21 52311034542
22 186308512214
23 663547605726
24 2363259841606
25 8416874736270
26 29977143892022
27 106765181148606

[0,2,6,22,78,278,990,3526,12558,44726,159294,
 567334,2020590,7196438,25630494,91284358,
 325114062,1157910902,4123960830,14687704294,
 52311034542,186308512214,663547605726,
 2363259841606,8416874736270,29977143892022,
 106765181148606]

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Last modified March 23 05:36 EDT 2019. Contains 321422 sequences. (Running on oeis4.)