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A000106 as a simple table

n a(n)
2 1
3 2
4 5
5 12
6 30
7 74
8 188
9 478
10 1235
11 3214
12 8450
13 22370
14 59676
15 160140
16 432237
17 1172436
18 3194870
19 8741442
20 24007045
21 66154654
22 182864692
23 506909562
24 1408854940
25 3925075510
26 10959698606
27 30665337738
28 85967279447
29 241433975446
30 679192039401
31 1913681367936
32 5399924120339

[1,2,5,12,30,74,188,478,1235,3214,8450,22370,
 59676,160140,432237,1172436,3194870,8741442,
 24007045,66154654,182864692,506909562,1408854940,
 3925075510,10959698606,30665337738,85967279447,
 241433975446,679192039401,1913681367936,
 5399924120339]

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Last modified April 18 18:57 EDT 2014. Contains 240733 sequences.