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A001006 as a simple table

n a(n)
0 1
1 1
2 2
3 4
4 9
5 21
6 51
7 127
8 323
9 835
10 2188
11 5798
12 15511
13 41835
14 113634
15 310572
16 853467
17 2356779
18 6536382
19 18199284
20 50852019
21 142547559
22 400763223
23 1129760415
24 3192727797
25 9043402501
26 25669818476
27 73007772802
28 208023278209
29 593742784829

[1,1,2,4,9,21,51,127,323,835,2188,5798,15511,
 41835,113634,310572,853467,2356779,6536382,
 18199284,50852019,142547559,400763223,1129760415,
 3192727797,9043402501,25669818476,73007772802,
 208023278209,593742784829]

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Last modified February 19 09:05 EST 2018. Contains 299330 sequences. (Running on oeis4.)