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A318714 as a simple table

na(n)
01
15040
250803200
38449588224000
4442893616349184000
555804595659997184000000
6315568291905804875857920000000
7211531737430299124385080934400000000
86522145617145034649275530739712000000000
9254485460571619683408716971558739902464000000000

[1,5040,50803200,8449588224000,442893616349184000,
 55804595659997184000000,
 315568291905804875857920000000,
 211531737430299124385080934400000000,
 6522145617145034649275530739712000000000,
 254485460571619683408716971558739902464000000000]