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A147808 as a simple table

na(n)
145
2495
349500
43314850
5331431000
627336542310
72733612983100
8238305122029260
923830484311542600
102140037814262627400
11214003761418373774000
1219587943639318412097360
131958794348735327250973600
14181693537570273520779480800

[45,495,49500,3314850,331431000,27336542310,
 2733612983100,238305122029260,23830484311542600,
 2140037814262627400,214003761418373774000,
 19587943639318412097360,1958794348735327250973600,
 181693537570273520779480800]