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A003659 formatted as a simple table:

n a(n)
1 1
2 1
3 2
4 6
5 26
6 152
7 1144
8 10742
9 122772
10 1673856
11 26780972
12 496090330
13 10519217930
14 252851833482
15 6832018188414
16 205985750827854
17 6885220780488694
18 253685194149119818
19 10250343686634687424

[1,1,2,6,26,152,1144,10742,122772,1673856,
 26780972,496090330,10519217930,252851833482,
 6832018188414,205985750827854,6885220780488694,
 253685194149119818,10250343686634687424]

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Last modified December 4 23:11 EST 2009. Contains 170347 sequences.


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