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A226888 as a simple table

na(n)
9362880
101814400
1116632000
12119750400
131003242240
147749181440
1568518850400
16584994009600
175490179735040
1851882551360640
19405925296678720
203438148872412800
2128858842800988480
22242180235433825920
232068546823359410240
2417716539920908308480
25155272065377761886400

[362880,1814400,16632000,119750400,1003242240,
 7749181440,68518850400,584994009600,5490179735040,
 51882551360640,405925296678720,3438148872412800,
 28858842800988480,242180235433825920,
 2068546823359410240,17716539920908308480,
 155272065377761886400]