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A127690 formatted as a simple table:

n a(n)
1 3
2 4
3 12
4 84
5 3612
6 6526884
7 21300113901612
8 226847426110843688722000884
9 25729877366557343481074291996721923093306518970391612 

[3,4,12,84,3612,6526884,21300113901612,
 226847426110843688722000884,
 25729877366557343481074291996721923093306518970391612]

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Last modified November 29 12:46 EST 2009. Contains 167659 sequences.

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