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A052846 as a simple table

n a(n)
0 0
1 0
2 2
3 9
4 40
5 215
6 1446
7 11893
8 115844
9 1302099
10 16568290
11 235237937
12 3684998208
13 63113398543
14 1173013230494
15 23509415868141
16 505358483764732
17 11597234229683147
18 282970077651917658
19 7314780938223880105

[0,0,2,9,40,215,1446,11893,115844,1302099,
 16568290,235237937,3684998208,63113398543,
 1173013230494,23509415868141,505358483764732,
 11597234229683147,282970077651917658,
 7314780938223880105]

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Last modified December 8 12:55 EST 2016. Contains 278945 sequences.