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A111282 formatted as a simple table:

n a(n)
1 1
2 2
3 6
4 16
5 42
6 110
7 288
8 754
9 1974
10 5168
11 13530
12 35422
13 92736
14 242786
15 635622
16 1664080
17 4356618
18 11405774
19 29860704
20 78176338
21 204668310
22 535828592
23 1402817466
24 3672623806
25 9615053952
26 25172538050
27 65902560198
28 172535142544

[1,2,6,16,42,110,288,754,1974,5168,13530,35422,
 92736,242786,635622,1664080,4356618,11405774,
 29860704,78176338,204668310,535828592,1402817466,
 3672623806,9615053952,25172538050,65902560198,
 172535142544]

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Last modified December 16 17:18 EST 2009. Contains 170825 sequences.


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