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A067092
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a(n) = floor(X/Y) where X = concatenation in decreasing order of (2n)-th even number to (n+1)-th even number and Y = that of first n even numbers in increasing order.
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12
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2, 3, 49, 6540, 8176, 9814, 11451, 13088, 14725, 16362, 17999, 19636, 21273, 22910, 24547, 26184, 27821, 29458, 31095, 32732, 34369, 36006, 37643, 39280, 40917, 4217902, 438013252, 45423626657, 4704592803725, 486682294165577
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OFFSET
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0,1
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LINKS
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EXAMPLE
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a(3) = floor[12108/246] = 49. a(8) = floor [ 3230282624222018/246810121416] = floor[13088.128662184629278356029087656] = 13088.
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MATHEMATICA
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Table[Floor[FromDigits[Flatten[IntegerDigits/@Range[4n, 2n+2, -2]]]/ FromDigits[ Flatten[IntegerDigits/@Range[2, 2n, 2]]]], {n, 30}] (* Harvey P. Dale, Mar 11 2019 *)
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CROSSREFS
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KEYWORD
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easy,nonn,base
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AUTHOR
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EXTENSIONS
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More terms from Antonio G. Astudillo (afg_astudillo(AT)lycos.com), Apr 01 2003
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STATUS
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approved
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