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A032563 Numbers n such that A102489(n) is divisible by n. 28
1, 2, 3, 4, 5, 6, 7, 8, 9, 1038, 1040, 2078, 2080, 2118, 2120, 3158, 3160, 3200, 4198, 4238, 4240, 5278, 5280, 5318, 5320, 6358, 6360, 6400, 7398, 7438, 7440, 8478, 8480, 8518, 8520, 9558, 9560, 9600, 12480, 25440, 38400, 112308, 449440 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Robert Israel, Table of n, a(n) for n = 1..71

EXAMPLE

...; 9{10} / 9{16} = 9 / 9 = 1; 4152{10} / 1038{16} = 4152 / 1038 = 4; 4160{10} / 1040{16} = 4160 / 1040 = 4; 8312{10} / 2078{16} = 8312 / 2078 = 4; ...

MAPLE

d:= Vector(10^7, 1):

for i from 1 to 7 do

   inds:= 10^i*[$1..10^(7-i)];

   d[inds]:= (2*16^i+3)/5;

od:

b:= Vector(10^7):

b[1]:= 1:

for i from 2 to 10^7 do

  b[i]:= b[i-1]+d[i]

od:

select(t-> (b[t]/ t)::integer, [$1..10^7]); # Robert Israel, Aug 30 2015

MATHEMATICA

Select[Range[16^5], IntegerQ[FromDigits[IntegerDigits[#], 16]/#] &] (* Michael De Vlieger, Aug 29 2015 *)

CROSSREFS

Cf. A032564, A102489.

Sequence in context: A181720 A004904 A122624 * A223081 A077727 A032557

Adjacent sequences:  A032560 A032561 A032562 * A032564 A032565 A032566

KEYWORD

nonn,base

AUTHOR

Patrick De Geest, April 1998

STATUS

approved

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Last modified August 27 16:30 EDT 2016. Contains 275911 sequences.