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A027742号作为一个简单的表

n个a(n)
11
22
6
416
560
6144
7756
82048
97776
1024000
11120032
12276480
131719900
144741632
1517820000
1667108864
17336849900
18725594112
194822382628
2011842560000
2157802864896
22200778006528
23998132265920
242283043553280
2513122000000000
2644980696051200
27178118842613760

[1,2,6,16,60,144,756,2048,7776,24000,120032,276480,1719900,4741632,17820000,67108864,336849900,725594112,4822382628,11842560000,57802864896,200778006528,998132265920,2283043553280,13122000000000,44980696051200,178118842613760]