A161449 - OEIS

%I #4 Jan 25 2018 10:04:02

%S 9,24,43,58,77,92,111,126,129,144,163,178,197,212,231,246,264,281,298,

%T 315,332,349,366,383,384,401,418,435,452,469,486,503,523,538,553,568,

%U 591,606,621,636,643,658,673,688,711,726,741,756,778,795,808,825,846

%N Numbers n such that A160700(n) = 9.

%H Charles R Greathouse IV, <a href="/A161449/b161449.txt">Table of n, a(n) for n = 1..10000</a>

%F 16n - 16 <= a(n) <= 16n - 1. - _Charles R Greathouse IV_, Jan 25 2018

%o (PARI) A160700(n)=my(t=n%16); while(n>15, n>>=4; t=bitxor(t, n%16)); t

%o a(n)=for(k=16*n-16, 16*n-1, if(a(k)==9, return(k))) \\ _Charles R Greathouse IV_, Jan 25 2018

%Y Cf. A161440, A161441, A161442, A161443, A161444, A161445, A161446, A161447, A161448, A161450, A161451, A161452, A161453, A161454, A161455.

%K nonn,easy

%O 1,1

%A _Reinhard Zumkeller_, Jun 10 2009