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A240686 as a simple table

n a(n)
9 1
10 45
11 1485
12 45540
13 1402830
14 44837793
15 1508782275
16 53789959080
17 2036262886515
18 81857181636945
19 3490649483399793
20 157637380245930000
21 7524305274666328785
22 378816067488484478160
23 20074256751067210380645
24 1117410784286881766178816
25 65207052558569641113281250

[1,45,1485,45540,1402830,44837793,1508782275,
 53789959080,2036262886515,81857181636945,
 3490649483399793,157637380245930000,
 7524305274666328785,378816067488484478160,
 20074256751067210380645,1117410784286881766178816,
 65207052558569641113281250]

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Last modified January 19 04:09 EST 2020. Contains 331031 sequences. (Running on oeis4.)