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A054951 formatted as a simple table:

n a(n)
1 1
2 1
3 4
4 78
5 4960
6 1041872
7 704369984
8 1579641879248
9 12137443766888448
10 328148810741254606592
11 31830752699315833628787200 

[1,1,4,78,4960,1041872,704369984,1579641879248,
 12137443766888448,328148810741254606592,
 31830752699315833628787200]

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Last modified December 16 17:18 EST 2009. Contains 170825 sequences.

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