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A027111 as a simple table

n a(n)
2 6
3 52
4 404
5 3237
6 26086
7 211730
8 1730114
9 14223429
10 117563545
11 976408938
12 8144436109
13 68197885773
14 573056586975
15 4830577196508
16 40836850965484
17 346138265331977

[6,52,404,3237,26086,211730,1730114,14223429,
 117563545,976408938,8144436109,68197885773,
 573056586975,4830577196508,40836850965484,
 346138265331977]

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Last modified May 18 14:19 EDT 2013. Contains 225419 sequences.