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A005632 formatted as a simple table:

n a(n)
1 0
2 0
3 5
4 22
5 258
6 1628
7 18052
8 145976
9 1837272
10 18407664
11 265312848
12 3184567136
13 52020223648
14 728304073664
15 13317701313600
16 213083801827200
17 4314950946864000
18 77669134543011584
19 1725980887361498368
20 34519618313219995136
21 835374767116711506432
22 18378244896208168541184

[0,0,5,22,258,1628,18052,145976,1837272,18407664,
 265312848,3184567136,52020223648,728304073664,
 13317701313600,213083801827200,4314950946864000,
 77669134543011584,1725980887361498368,
 34519618313219995136,835374767116711506432,
 18378244896208168541184]

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Last modified December 3 22:15 EST 2009. Contains 170310 sequences.


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