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A026269 formatted as a simple table:

n a(n)
2 1
3 2
4 4
5 10
6 25
7 64
8 166
9 436
10 1157
11 3098
12 8360
13 22714
14 62086
15 170614
16 471096
17 1306374
18 3636708
19 10159590
20 28473132
21 80032638
22 225562929
23 637301652
24 1804751718
25 5121677512
26 14563448593
27 41487279622
28 118389089432
29 338381552294
30 968627180975

[1,2,4,10,25,64,166,436,1157,3098,8360,22714,
 62086,170614,471096,1306374,3636708,10159590,
 28473132,80032638,225562929,637301652,1804751718,
 5121677512,14563448593,41487279622,118389089432,
 338381552294,968627180975]

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Last modified December 2 11:54 EST 2009. Contains 167921 sequences.


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