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A057795 formatted as a simple table:

n a(n)
1 1
2 1
3 3
4 7
5 33
6 121
7 873
8 5167
9 45507
10 367927
11 4037913
12 39921961
13 522956313
14 6267300607
15 93445274187
16 1313941673647
17 22324392524313
18 355693695038761
19 6780385526348313
20 122000794104233527
21 2554923725074062867

[1,1,3,7,33,121,873,5167,45507,367927,4037913,
 39921961,522956313,6267300607,93445274187,
 1313941673647,22324392524313,355693695038761,
 6780385526348313,122000794104233527,
 2554923725074062867]

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Last modified December 6 22:55 EST 2009. Contains 170429 sequences.


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