A087994 Integer values of quotients arising in A087993. The quotient is (n+rev(n))/abs(n-rev(n)).

11, 11, 11, 11, 5, 11, 11, 11, 132, 132, 11, 5, 19, 37, 37, 55, 55, 73, 73, 5, 11, 91, 11, 91, 11, 11, 5, 67, 67, 12, 12, 19, 37, 37, 55, 55, 73, 73, 5, 11, 11, 91, 11, 11, 91, 22, 44, 132, 11, 110, 132, 11, 44, 110, 4, 22, 109, 11, 11, 109, 5, 127, 127, 145, 145, 163, 163, 4

Offset

1,1

Links

Giovanni Resta, Table of n, a(n) for n = 1..500

Example

n=45, rev(n)=54, q=99/9=9 integer;
n=934065, rev(n)=560434, q=1494504/373626=4
Values observed as quotients:
11,5,132,19,37,55,73,91,67,12,55,22,44,110,4,109,127,163,

Mathematica

rev[n_] := FromDigits@ Reverse@ IntegerDigits@ n;
Reap[Do[r=rev@n; If[n != r && IntegerQ[q = (n+r)/(n-r)], Sow@ Abs@ q], {n, 5*^5}]][[2, 1]]

Crossrefs

Cf. A087993.

Sequence in context: A252838 A366717 A212541 * A100755 A171902 A337241

Adjacent sequences: A087991 A087992 A087993 * A087995 A087996 A087997

Keyword

base,nonn

Author

Labos Elemer, Oct 08 2003

Status

approved