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A000018 as a simple table

n a(n)
0 1
1 1
2 2
3 2
4 4
5 8
6 13
7 25
8 44
9 83
10 152
11 286
12 538
13 1020
14 1942
15 3725
16 7145
17 13781
18 26627
19 51572
20 100099
21 194633
22 379037
23 739250
24 1443573
25 2822186
26 5522889
27 10818417
28 21209278
29 41613288
30 81705516
31 160532194
32 315604479
33 620834222
34 1221918604
35 2406183020
36 4740461247

[1,1,2,2,4,8,13,25,44,83,152,286,538,1020,1942,
 3725,7145,13781,26627,51572,100099,194633,379037,
 739250,1443573,2822186,5522889,10818417,21209278,
 41613288,81705516,160532194,315604479,620834222,
 1221918604,2406183020,4740461247]

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Last modified April 29 03:15 EDT 2024. Contains 372097 sequences. (Running on oeis4.)