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A183106 Numbers n such that sum of palindromic divisors of n (A088000(n)) is palindromic. 1

%I #10 Sep 09 2015 12:31:25

%S 1,2,3,4,5,7,10,13,15,17,19,21,23,25,26,29,31,34,37,38,39,41,43,46,47,

%T 49,50,51,52,53,56,57,58,59,61,62,65,67,68,69,71,72,73,74,75,76,79,82,

%U 83,85,86

%N Numbers n such that sum of palindromic divisors of n (A088000(n)) is palindromic.

%F A000005(a(n)) = A183107(n)

%e a(12) = 21; palindromic divisors of 21: 1, 3, 7; their sum is 11 (palindromic number).

%p isA183106 := proc(n)

%p isA002113(A088000(n)) ;

%p end proc:

%p for n from 1 to 100 do

%p if isA183106(n) then

%p printf("%d,",n) ;

%p end if;

%p end do: # _R. J. Mathar_, Sep 09 2015

%K nonn,base

%O 1,2

%A _Jaroslav Krizek_, Dec 25 2010

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Last modified April 19 11:31 EDT 2024. Contains 371792 sequences. (Running on oeis4.)