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.

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

Offset: 0

Author

Amarnath Murthy, Jan 07 2002

Keywords

• easy
• nonn
• base

Examples

			a(3) = floor[12108/246] = 49. a(8) = floor [ 3230282624222018/246810121416] = floor[13088.128662184629278356029087656] = 13088.
		

Links

• Harvey P. Dale, Table of n, a(n) for n = 0..1000

Crossrefs

Cf. A067088, A067089, A067090, A067091.

Programs

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 *)

Extensions

More terms from Antonio G. Astudillo (afg_astudillo(AT)lycos.com), Apr 01 2003

Edited by Charles R Greathouse IV, Apr 23 2010