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A066810 as a simple table

n a(n)
0 0
1 0
2 1
3 7
4 33
5 131
6 473
7 1611
8 5281
9 16867
10 52905
11 163835
12 502769
13 1532883
14 4651897
15 14070379
16 42456897
17 127894979
18 384799049
19 1156756443
20 3475250065
21 10436235955
22 31330727961
23 94038321227
24 282211432673
25 846835624611

[0,0,1,7,33,131,473,1611,5281,16867,52905,163835,
 502769,1532883,4651897,14070379,42456897,
 127894979,384799049,1156756443,3475250065,
 10436235955,31330727961,94038321227,282211432673,
 846835624611]

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Last modified May 20 02:57 EDT 2013. Contains 225446 sequences.