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A000117 formatted as a simple table:

n a(n)
0 1
1 2
2 4
3 8
4 18
5 44
6 122
7 362
8 1162
9 3914
10 13648
11 48734
12 176906
13 649532
14 2405236
15 8964800
16 33588234
17 126390032
18 477353376
19 1808676326
20 6872485104
21 26179922024
22 99957747388
23 382443112538
24 1466024067850
25 5629516646996
26 21651955485304
27 83400061453514

[1,2,4,8,18,44,122,362,1162,3914,13648,48734,
 176906,649532,2405236,8964800,33588234,126390032,
 477353376,1808676326,6872485104,26179922024,
 99957747388,382443112538,1466024067850,
 5629516646996,21651955485304,83400061453514]

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Last modified December 8 08:31 EST 2009. Contains 170430 sequences.


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