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A047016 as a simple table

n a(n)
0 1
1 2
2 6
3 19
4 65
5 231
6 837
7 3081
8 11475
9 43105
10 163028
11 620016
12 2368717
13 9083894
14 34948812
15 134833093
16 521441459
17 2020832892
18 7846285977
19 30515284116
20 118854299343
21 463545526625
22 1810067726305
23 7075783888734
24 27687908165495

[1,2,6,19,65,231,837,3081,11475,43105,163028,
 620016,2368717,9083894,34948812,134833093,
 521441459,2020832892,7846285977,30515284116,
 118854299343,463545526625,1810067726305,
 7075783888734,27687908165495]

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Last modified May 21 21:21 EDT 2013. Contains 225505 sequences.