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A133426 as a simple table

na(n)
18
250
3162
4470
59584
628400
791890
8193040
9265070
10291824
11337100
12388830
13524070
143231824
1518052070
1630949850
1731021880
1865552768
19774659600
2010276607888
2138128783428
22190067750300
234835458627140
2425515567812750

[8,50,162,470,9584,28400,91890,193040,265070,
 291824,337100,388830,524070,3231824,18052070,
 30949850,31021880,65552768,774659600,10276607888,
 38128783428,190067750300,4835458627140,
 25515567812750]