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A033030 formatted as a simple table:

n a(n)
0 1
1 0
2 3
3 18
4 189
5 2484
6 40095
7 766422
8 16936857
9 424878696
10 11929019931
11 370616958810
12 12624017298453
13 467806833261468
14 18736803171836919
15 806593620214132254
16 37139869052368612785
17 1821430208283971761872
18 94787073944153359107507
19 5216859224231615866946466

[1,0,3,18,189,2484,40095,766422,16936857,
 424878696,11929019931,370616958810,12624017298453,
 467806833261468,18736803171836919,
 806593620214132254,37139869052368612785,
 1821430208283971761872,94787073944153359107507,
 5216859224231615866946466]

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Last modified November 30 13:13 EST 2009. Contains 167758 sequences.


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