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A138265 formatted as a simple table:

n a(n)
0 1
1 1
2 1
3 2
4 5
5 16
6 61
7 271
8 1372
9 7795
10 49093
11 339386
12 2554596
13 20794982
14 182010945
15 1704439030
16 17003262470
17 180011279335
18 2015683264820
19 23801055350435
20 295563725628564
21 3850618520827590
22 52514066450469255

[1,1,1,2,5,16,61,271,1372,7795,49093,339386,
 2554596,20794982,182010945,1704439030,17003262470,
 180011279335,2015683264820,23801055350435,
 295563725628564,3850618520827590,
 52514066450469255]

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Last modified December 20 13:54 EST 2009. Contains 171081 sequences.


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