This site is supported by donations to The OEIS Foundation.

 Please make a donation to keep the OEIS running. We are now in our 55th year. In the past year we added 12000 new sequences and reached 8000 citations (which often say "discovered thanks to the OEIS"). We need to raise money to hire someone to manage submissions, which would reduce the load on our editors and speed up editing. Other ways to donate

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A032563 Numbers k such that A102489(k) is divisible by k. 27
 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, Apr 15 1998 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified December 16 06:18 EST 2019. Contains 330016 sequences. (Running on oeis4.)