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A141288 as a simple table

na(n)
01
11
22
36
412
584
6252
7252
8504
92520
1017640
1152920
1252920
1352920
1452920
15476280
16952560
17952560
184762800
1961916400
20185749200
21928746000
22928746000
23928746000
24928746000
254643730000
2613931190000
2713931190000
2813931190000
2913931190000

[1,1,2,6,12,84,252,252,504,2520,17640,52920,52920,
 52920,52920,476280,952560,952560,4762800,61916400,
 185749200,928746000,928746000,928746000,928746000,
 4643730000,13931190000,13931190000,13931190000,
 13931190000]