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A270254 as a simple table

na(n)
10
272
314976
47876728
512712991544
667475902622400
71217128601064427992
875996953900646817459320
916613624242885262049626796576

[0,72,14976,7876728,12712991544,67475902622400,
 1217128601064427992,75996953900646817459320,
 16613624242885262049626796576]