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A007511 formatted as a simple table:

n a(n)
1 2
2 50
3 325
4 1105
5 5525
6 27625
7 71825
8 138125
9 160225
10 801125
11 2082925
12 4005625
13 5928325
14 29641625
15 77068225
16 148208125
17 243061325
18 1215306625
19 3159797225
20 6076533125
21 12882250225
22 53716552825
23 64411251125
24 167469252925

[2,50,325,1105,5525,27625,71825,138125,160225,
 801125,2082925,4005625,5928325,29641625,77068225,
 148208125,243061325,1215306625,3159797225,
 6076533125,12882250225,53716552825,64411251125,
 167469252925]

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Last modified December 20 00:58 EST 2009. Contains 171054 sequences.


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