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A014937
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a(1)=1, a(n)=n*20^(n-1)+a(n-1).
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10
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1, 41, 1241, 33241, 833241, 20033241, 468033241, 10708033241, 241108033241, 5361108033241, 118001108033241, 2575601108033241, 55823601108033241, 1202703601108033241, 25778703601108033241, 550066703601108033241
(list; graph; refs; listen; history; internal format)
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