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A067687 as a simple table

n a(n)
0 1
1 1
2 2
3 5
4 12
5 29
6 69
7 165
8 393
9 937
10 2233
11 5322
12 12683
13 30227
14 72037
15 171680
16 409151
17 975097
18 2323870
19 5538294
20 13198973
21 31456058
22 74966710
23 178662171
24 425791279
25 1014754341
26 2418382956
27 5763538903
28 13735781840
29 32735391558
30 78015643589

[1,1,2,5,12,29,69,165,393,937,2233,5322,12683,
 30227,72037,171680,409151,975097,2323870,5538294,
 13198973,31456058,74966710,178662171,425791279,
 1014754341,2418382956,5763538903,13735781840,
 32735391558,78015643589]

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Last modified June 20 10:13 EDT 2019. Contains 324234 sequences. (Running on oeis4.)