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A283742 Numbers with digit sum 11 that are multiples of 11. 3

%I #24 Mar 19 2017 19:51:42

%S 209,308,407,506,605,704,803,902,2090,3080,4070,5060,6050,7040,8030,

%T 9020,10109,10208,10307,10406,10505,10604,10703,10802,10901,20009,

%U 20108,20207,20306,20405,20504,20603,20702,20801,20900,30008,30107,30206,30305,30404

%N Numbers with digit sum 11 that are multiples of 11.

%C Subsequence of A166311.

%C Numbers with digit sum 11 and even-numbered digits all 0. - _Robert Israel_, Mar 16 2017

%C Intersection of A008593 and A166311. - _Michel Marcus_, Mar 17 2017

%C If m is a term, so is 10*m. - _Zak Seidov_, Mar 17 2017

%H Robert Israel, <a href="/A283742/b283742.txt">Table of n, a(n) for n = 1..10000</a>

%e a(1) = A166311(18) = 209 = 19*11,

%e a(40) = A166311(9881) = 30404 = 2764*11.

%p F:= proc(d,t) option remember;

%p if d <= 1 then

%p if t <= 9 then return [t*10^d] else return [] fi;

%p fi;

%p [seq(seq(j*10^d+s, s = procname(d-2, t-j)), j=0..min(9, t))]

%p end proc:

%p sort([op(F(4,11)),op(F(5,11))]); # _Robert Israel_, Mar 16 2017

%t Reap[Do[If[11==Total[IntegerDigits[m=11*k]],Sow[m]],{k,3000}]][[2,1]]

%t Select[Range[209,30404,11],11==Total[IntegerDigits[#]]&]

%Y Cf. A008593 (multiples of 11), A166311 (numbers with digit sum 11).

%K nonn,base

%O 1,1

%A _Zak Seidov_, Mar 15 2017

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Last modified April 23 02:23 EDT 2024. Contains 371906 sequences. (Running on oeis4.)