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A018024 as a simple table

n a(n)
0 1
1 2
2 6
3 17
4 43
5 112
6 289
7 743
8 1910
9 4913
10 12632
11 32482
12 83521
13 214756
14 552198
15 1419857
16 3650852
17 9387368
18 24137569
19 62064486
20 159585272
21 410338673
22 1055096275
23 2712949630
24 6975757441
25 17936636688
26 46120143716
27 118587876497
28 304922823711
29 784042443182

[1,2,6,17,43,112,289,743,1910,4913,12632,32482,
 83521,214756,552198,1419857,3650852,9387368,
 24137569,62064486,159585272,410338673,1055096275,
 2712949630,6975757441,17936636688,46120143716,
 118587876497,304922823711,784042443182]

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Last modified March 19 11:03 EDT 2019. Contains 321329 sequences. (Running on oeis4.)