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A149268 formatted as a simple table:

n a(n)
0 1
1 1
2 4
3 11
4 40
5 147
6 537
7 2067
8 8090
9 31759
10 127226
11 512728
12 2085944
13 8530109
14 35108141
15 145290427
16 603473533
17 2516899058
18 10535376447
19 44235546052
20 186238821286
21 786137476704
22 3326533736676
23 14104293872530
24 59921599051958
25 255045546995888
26 1087354970834820
27 4643011158411006

[1,1,4,11,40,147,537,2067,8090,31759,127226,
 512728,2085944,8530109,35108141,145290427,
 603473533,2516899058,10535376447,44235546052,
 186238821286,786137476704,3326533736676,
 14104293872530,59921599051958,255045546995888,
 1087354970834820,4643011158411006]

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Last modified December 15 00:47 EST 2009. Contains 170825 sequences.


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