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A127553 as a simple table

na(n)
11
22
318
496
515000
66480
784707280
841287680
921427701120
1056700000000
1194121726392108800
122483144294400
1311159820050604594969600
1424625709514114508800
15620634514500000000000
16359450793240158011392000

[1,2,18,96,15000,6480,84707280,41287680,
 21427701120,56700000000,94121726392108800,
 2483144294400,11159820050604594969600,
 24625709514114508800,620634514500000000000,
 359450793240158011392000]