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A000343 formatted as a simple table:

n a(n)
5 1
6 5
7 20
8 70
9 230
10 721
11 2200
12 6575
13 19385
14 56575
15 163952
16 472645
17 1357550
18 3888820
19 11119325
20 31753269
21 90603650
22 258401245
23 736796675
24 2100818555
25 5990757124
26 17087376630
27 48753542665
28 139155765455
29 397356692275

[1,5,20,70,230,721,2200,6575,19385,56575,163952,
 472645,1357550,3888820,11119325,31753269,90603650,
 258401245,736796675,2100818555,5990757124,
 17087376630,48753542665,139155765455,
 397356692275]

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Last modified December 6 19:58 EST 2009. Contains 170429 sequences.


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