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A083069
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Main diagonal of number array A083064.
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7
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1, 2, 11, 94, 1037, 14006, 224695, 4185098, 88888889, 2122152922, 56288512931, 1642813694534, 52332842192581, 1807181134905134, 67253754435399407, 2683521610790452306, 114296029267382825201, 5175920921241202064498
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internal format)
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OFFSET
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0,2
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LINKS
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FORMULA
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a(n) = (n*(n+2)^n+1)/(n+1).
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MATHEMATICA
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CROSSREFS
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KEYWORD
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easy,nonn
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AUTHOR
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STATUS
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approved
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