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A082279 formatted as a simple table:

n a(n)
1 1
2 2
3 4
4 8
5 20
6 54
7 152
8 464
9 1532
10 5334
11 19764
12 77042
13 316760
14 1361630
15 6129422
16 28709012
17 139999730
18 707500404
19 3705539918
20 20045427240
21 111972406422
22 644198989898
23 3815636759538

[1,2,4,8,20,54,152,464,1532,5334,19764,77042,
 316760,1361630,6129422,28709012,139999730,
 707500404,3705539918,20045427240,111972406422,
 644198989898,3815636759538]

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Last modified December 1 19:22 EST 2009. Contains 167811 sequences.


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