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A051254 as a simple table

na(n)
12
211
31361
42521008887
516022236204009818131831320183
64113101149215104800030529537915953170486139623539759933135949994882770404074832568499

[2,11,1361,2521008887,
 16022236204009818131831320183,
 41131011492151048000305295379159531704861396235397\
 59933135949994882770404074832568499]