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A067118
a(n) =floor[X/Y] where X= concatenation of first n even numbers in decreasing order and Y = that of first n odd numbers in increasing order.
1
2, 3, 4, 6, 8, 8, 10, 11, 13, 14, 16, 17, 19, 20, 22, 23, 25, 26, 28, 29, 31, 32, 34, 35, 37, 38, 40, 41, 43, 44, 46, 47, 49, 50, 52, 53, 55, 56, 58, 59, 60, 62, 63, 65, 66, 68, 69, 71, 72, 74, 75, 76, 78, 79, 81, 82, 84, 85, 86, 88, 89, 91, 92, 94, 95, 97, 98, 100, 101, 103
OFFSET
1,1
EXAMPLE
a(4) = floor[8642/1357] = floor[6.368...] = 6.
MAPLE
for i from 1 to 50 do c := 2:n := 4:m := 2*i-1:d := m:m := m-2:while(m>0) do g := floor(log(c+1)/log(10)):c := c+10^(g)*n:n := n+2:g := floor(log(d)/log(10)): d := d+10^(g+1)*m:m := m-2:end do:a[i] := floor(c/d):end do:q := seq(a[j], j=1..50);
MATHEMATICA
Table[Floor[FromDigits[Flatten[IntegerDigits/@Range[2n, 2, -2]]]/FromDigits[ Flatten[IntegerDigits/@Range[1, 2n-1, 2]]]], {n, 80}] (* Harvey P. Dale, Nov 02 2013 *)
CROSSREFS
KEYWORD
easy,nonn,base
AUTHOR
Amarnath Murthy, Jan 08 2002
EXTENSIONS
More terms from Sascha Kurz, Mar 23 2002
Edited by Charles R Greathouse IV, Apr 27 2010
STATUS
approved