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A030056 as a simple table

n a(n)
6 1
7 15
8 136
9 969
10 5985
11 33649
12 177100
13 888030
14 4292145
15 20160075
16 92561040
17 417225900
18 1852482996
19 8122425444
20 35240152720
21 151532656696
22 646626422970
23 2741188875414
24 11554258485616
25 48459472266975

[1,15,136,969,5985,33649,177100,888030,4292145,
 20160075,92561040,417225900,1852482996,8122425444,
 35240152720,151532656696,646626422970,
 2741188875414,11554258485616,48459472266975]

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Last modified February 20 08:44 EST 2019. Contains 320325 sequences. (Running on oeis4.)