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A018180 as a simple table

n a(n)
0 1
1 1
2 3
3 6
4 12
5 23
6 43
7 80
8 150
9 282
10 529
11 990
12 1854
13 3471
14 6498
15 12167
16 22778
17 42645
18 79839
19 149474
20 279841
21 523910
22 980849
23 1836318
24 3437902
25 6436343
26 12049936
27 22559543
28 42235329
29 79071767
30 148035889

[1,1,3,6,12,23,43,80,150,282,529,990,1854,3471,
 6498,12167,22778,42645,79839,149474,279841,523910,
 980849,1836318,3437902,6436343,12049936,22559543,
 42235329,79071767,148035889]

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Last modified April 24 22:17 EDT 2024. Contains 371964 sequences. (Running on oeis4.)