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A000734 as a simple table

n a(n)
0 1
1 2
2 5
3 15
4 49
5 177
6 715
7 3255
8 16689
9 95777
10 609875
11 4270695
12 32624329
13 269995377
14 2406363835
15 22979029335
16 234062319969
17 2533147494977
18 29027730898595
19 351112918079175
20 4470508510495609
21 59766296291090577

[1,2,5,15,49,177,715,3255,16689,95777,609875,
 4270695,32624329,269995377,2406363835,22979029335,
 234062319969,2533147494977,29027730898595,
 351112918079175,4470508510495609,
 59766296291090577]

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Last modified April 10 02:39 EDT 2020. Contains 333392 sequences. (Running on oeis4.)