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A001696 as a simple table

n a(n)
0 0
1 1
2 2
3 4
4 12
5 108
6 10476
7 108625644
8 11798392680793836
9 139202068568601568785946949658348
10 19377215893777651167043206536157529523359277782016064519251404524

[0,1,2,4,12,108,10476,108625644,11798392680793836,
 139202068568601568785946949658348,
 19377215893777651167043206536157529523359277782016\
 064519251404524]

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Last modified June 19 07:51 EDT 2013. Contains 226399 sequences.