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A000185 as a simple table

n a(n)
5 2
6 24
7 140
8 1232
9 11268
10 115056
11 1284360
12 15596208
13 204710454
14 2888897032
15 43625578836
16 702025263328
17 11993721979336
18 216822550325472
19 4135337882588880
20 82986434235959712
21 1747976804189353962
22 38559791049947726328
23 889047923669760546140

[2,24,140,1232,11268,115056,1284360,15596208,
 204710454,2888897032,43625578836,702025263328,
 11993721979336,216822550325472,4135337882588880,
 82986434235959712,1747976804189353962,
 38559791049947726328,889047923669760546140]

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Last modified February 18 17:08 EST 2018. Contains 299325 sequences. (Running on oeis4.)