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A027774 as a simple table

n a(n)
13 14
14 225
15 1920
16 11560
17 55080
18 220932
19 775200
20 2441880
21 7034940
22 18795370
23 47070144
24 111435000
25 251100200
26 541574100
27 1123264800
28 2249204040
29 4362680250
30 8220658275
31 15085939200
32 27020703600
33 47327171760
34 81198579000
35 136666699200
36 225962211600
37 367443055800

[14,225,1920,11560,55080,220932,775200,2441880,
 7034940,18795370,47070144,111435000,251100200,
 541574100,1123264800,2249204040,4362680250,
 8220658275,15085939200,27020703600,47327171760,
 81198579000,136666699200,225962211600,
 367443055800]

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Last modified May 28 22:08 EDT 2022. Contains 354122 sequences. (Running on oeis4.)