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A053292 as a simple table

na(n)
01
14
2480
31488000
4116064000000
5226614960000000000
611064475422000000000000000
713506266841692625000000000000000000
8412177498341354683437500000000000000000000000

[1,4,480,1488000,116064000000,226614960000000000,
 11064475422000000000000000,
 13506266841692625000000000000000000,
 412177498341354683437500000000000000000000000]