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 A067092 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. 12
 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 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,1 LINKS Harvey P. Dale, Table of n, a(n) for n = 0..1000 EXAMPLE a(3) = floor[12108/246] = 49. a(8) = floor [ 3230282624222018/246810121416] = floor[13088.128662184629278356029087656] = 13088. MATHEMATICA 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 *) CROSSREFS Cf. A067088, A067089, A067090, A067091. Sequence in context: A118222 A191594 A208204 * A041133 A113700 A065646 Adjacent sequences:  A067089 A067090 A067091 * A067093 A067094 A067095 KEYWORD easy,nonn,base AUTHOR Amarnath Murthy, Jan 07 2002 EXTENSIONS More terms from Antonio G. Astudillo (afg_astudillo(AT)lycos.com), Apr 01 2003 Edited by Charles R Greathouse IV, Apr 23 2010 STATUS approved

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Last modified January 22 22:16 EST 2020. Contains 331166 sequences. (Running on oeis4.)