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A046233 formatted as a simple table:

n a(n)
1 0
2 1
3 6
4 26
5 126
6 626
7 3126
8 15626
9 78126
10 390626
11 1953126
12 9765626
13 48828126
14 244140626
15 1220703126
16 6103515626
17 30517578126
18 152587890626
19 762939453126
20 3814697265626
21 19073486328126
22 95367431640626
23 476837158203126

[0,1,6,26,126,626,3126,15626,78126,390626,1953126,
 9765626,48828126,244140626,1220703126,6103515626,
 30517578126,152587890626,762939453126,
 3814697265626,19073486328126,95367431640626,
 476837158203126]

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Last modified December 20 16:13 EST 2009. Contains 171081 sequences.


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