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A000564 formatted as a simple table:

n a(n)
3 20
4 371
5 2588
6 11097
7 35645
8 94457
9 218124
10 454220
11 872648
12 1571715
13 2684936
14 4388567
15 6909867
16 10536089
17 15624200
18 22611330
19 32025950
20 44499779
21 60780420
22 81744725
23 108412889
24 141963273
25 183747956
26 235309016
27 298395540

[20,371,2588,11097,35645,94457,218124,454220,
 872648,1571715,2684936,4388567,6909867,10536089,
 15624200,22611330,32025950,44499779,60780420,
 81744725,108412889,141963273,183747956,235309016,
 298395540]

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Last modified December 6 13:45 EST 2009. Contains 170429 sequences.


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