A161445 - OEIS

%I #4 Jan 25 2018 09:59:01

%S 5,20,39,54,65,80,99,114,141,156,175,190,201,216,235,250,260,277,294,

%T 311,320,337,354,371,396,413,430,447,456,473,490,507,519,534,549,564,

%U 579,594,609,624,655,670,685,700,715,730,745,760,774,791,804,821,834

%N Numbers n such that A160700(n) = 5.

%H Charles R Greathouse IV, <a href="/A161445/b161445.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)==5, return(k))) \\ _Charles R Greathouse IV_, Jan 25 2018

%Y Cf. A161440, A161441, A161442, A161443, A161444, A161446, A161447, A161448, A161449, A161450, A161451, A161452, A161453, A161454, A161455.

%K nonn,easy

%O 1,1

%A _Reinhard Zumkeller_, Jun 10 2009