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A069642 as a simple table

na(n)
15
21260
38890560
41408264704000
54485780768268800000
6269685408935166352128000000
7294004853789028834558485643264000000
85657409727323500620299434201290024943616000000

[5,1260,8890560,1408264704000,4485780768268800000,
 269685408935166352128000000,
 294004853789028834558485643264000000,
 5657409727323500620299434201290024943616000000]