A079831 Numbers n such that floor(reverse(n)/n) = 2.

13, 14, 25, 26, 27, 28, 38, 39, 103, 113, 123, 133, 143, 153, 154, 163, 164, 173, 174, 183, 184, 193, 194, 205, 206, 215, 216, 225, 226, 235, 236, 245, 246, 255, 256, 257, 265, 266, 267, 275, 276, 277, 285, 286, 287, 295, 296, 297, 298, 307, 308, 309, 317

Offset

1,1

Links

Edward Jiang, Table of n, a(n) for n = 1..10000

Example

14 is a member as floor(41/14) = 2.

Mathematica

Select[Range[400], Floor[IntegerReverse[#]/#]==2&] (* Requires Mathematica version 10 or later *) (* Harvey P. Dale, Feb 05 2019 *)

Prog

(ARIBAS) for n := 1 to 318 do nst := ""; st := itoa(n); for i := 0 to length(st) - 1 do nst := concat(st[i], nst); end; a := atoi(nst); if a div n = 2 then write(n, ", ") end; end;
(PARI) for(n=1, 1100, if(floor(eval(concat(Vecrev(Str(n))))/n)==2, print1(n, ", "))) \\ Edward Jiang, Aug 19 2014
(Python)
from math import floor
for i in range(1, 1000):
....if floor(int(str(i)[::-1])/i)==2:
........print(i)
# Edward Jiang, Aug 19 2014

Crossrefs

Cf. A079832.

Sequence in context: A360528 A336004 A296795 * A022803 A112653 A301660

Adjacent sequences: A079828 A079829 A079830 * A079832 A079833 A079834

Keyword

base,nonn

Author

Amarnath Murthy, Feb 11 2003

Extensions

Edited and extended by Klaus Brockhaus, Feb 12 2003

Status

approved