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A026671 formatted as a simple table:

n a(n)
0 1
1 3
2 11
3 43
4 173
5 707
6 2917
7 12111
8 50503
9 211263
10 885831
11 3720995
12 15652239
13 65913927
14 277822147
15 1171853635
16 4945846997
17 20884526283
18 88224662549
19 372827899079
20 1576001732485
21 6663706588179
22 28181895551161
23 119208323665543

[1,3,11,43,173,707,2917,12111,50503,211263,885831,
 3720995,15652239,65913927,277822147,1171853635,
 4945846997,20884526283,88224662549,372827899079,
 1576001732485,6663706588179,28181895551161,
 119208323665543]

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Last modified December 11 12:57 EST 2009. Contains 170656 sequences.


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