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A110424 as a simple table

na(n)
36
440
570
66048
711088
82471040
94633200
108236800
1114002560
122559871641600
134906420646400
144981904040960000
159607957793280000
1617934854547456000
1732506923867264000
1848825552622389903360000
1994938574543535923200000

[6,40,70,6048,11088,2471040,4633200,8236800,
 14002560,2559871641600,4906420646400,
 4981904040960000,9607957793280000,
 17934854547456000,32506923867264000,
 48825552622389903360000,94938574543535923200000]