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A001425 formatted as a simple table:

n a(n)
0 1
1 1
2 4
3 129
4 43968
5 254429900
6 30468670170912
7 91267244789189735259
8 8048575431238519331999571800
9 24051927835861852500932966021650993560
10 2755731922430783367615449408031031255131879354330

[1,1,4,129,43968,254429900,30468670170912,
 91267244789189735259,8048575431238519331999571800,
 24051927835861852500932966021650993560,
 2755731922430783367615449408031031255131879354330]

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Last modified December 13 23:45 EST 2009. Contains 170824 sequences.


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