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A006493 formatted as a simple table:

n a(n)
3 1
4 0
5 6
6 7
7 28
8 54
9 135
10 286
11 627
12 1313
13 2730
14 5565
15 11212
16 22304
17 43911
18 85614
19 165490
20 317373
21 604296
22 1143054
23 2149074
24 4017950
25 7473180
26 13832910
27 25490115
28 46774448

[1,0,6,7,28,54,135,286,627,1313,2730,5565,11212,
 22304,43911,85614,165490,317373,604296,1143054,
 2149074,4017950,7473180,13832910,25490115,
 46774448]

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Last modified December 15 00:47 EST 2009. Contains 170825 sequences.


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