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 A160542 Not divisible by 11 6

%I

%S 1,2,3,4,5,6,7,8,9,10,12,13,14,15,16,17,18,19,20,21,23,24,25,26,27,28,

%T 29,30,31,32,34,35,36,37,38,39,40,41,42,43,45,46,47,48,49,50,51,52,53,

%U 54,56,57,58,59,60,61,62,63,64,65,67,68,69,70,71

%N Not divisible by 11

%C Contains numbers like 100, 111, 112, 113 which are not in A043096. [_R. J. Mathar_, May 20 2009]

%H <a href="/index/Rec#order_11">Index entries for linear recurrences with constant coefficients</a>, signature (1,0,0,0,0,0,0,0,0,1,-1).

%F a(n) = a(n-10) + 11, n>10. - _R. J. Mathar_, May 20 2009

%F G.f.: x*(1+x+x^2+x^3+x^4+x^5+x^6+x^7+x^8+x^9+x^10) / ( (1+x)*(1+x+x^2+x^3+x^4)*(x^4-x^3+x^2-x+1)*(x-1)^2 ). - _R. J. Mathar_, May 02 2014

%t Select[Table[n,{n,200}],Mod[#,11]!=0&] (* _Vladimir Joseph Stephan Orlovsky_, Feb 18 2011*)

%o (Sage) [i for i in range(72) if gcd(11, i) == 1]

%K nonn,easy

%O 1,2

%A _Zerinvary Lajos_, May 18 2009

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Last modified June 25 12:01 EDT 2019. Contains 324352 sequences. (Running on oeis4.)