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A123184 formatted as a simple table:

n a(n)
1 1
2 1
3 3
4 15
5 103
6 829
7 7131
8 62901
9 559897
10 4999879
11 44699763
12 399783639
13 3576070333
14 31989586339
15 286166485929
16 2559950572641
17 22900519062931
18 204861053422423
19 1832624941137951
20 16394109244633845
21 146656754883677131

[1,1,3,15,103,829,7131,62901,559897,4999879,
 44699763,399783639,3576070333,31989586339,
 286166485929,2559950572641,22900519062931,
 204861053422423,1832624941137951,
 16394109244633845,146656754883677131]

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Last modified December 7 08:40 EST 2009. Contains 170430 sequences.


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