This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A161442 #6 Jan 25 2018 09:51:47 %S A161442 2,19,32,49,70,87,100,117,138,155,168,185,206,223,236,253,259,274,289, %T A161442 304,327,342,357,372,395,410,425,440,463,478,493,508,512,529,546,563, %U A161442 580,597,614,631,648,665,682,699,716,733,750,767,769,784,803,818,837 %N A161442 Numbers n such that A160700(n) = 2. %H A161442 Charles R Greathouse IV, <a href="/A161442/b161442.txt">Table of n, a(n) for n = 1..10000</a> %F A161442 16n - 16 <= a(n) <= 16n - 1. - _Charles R Greathouse IV_, Jan 25 2018 %o A161442 (PARI) A160700(n)=my(t=n%16); while(n>15, n>>=4; t=bitxor(t, n%16)); t %o A161442 a(n)=for(k=16*n-16,16*n-1, if(a(k)==2, return(k))) \\ _Charles R Greathouse IV_, Jan 25 2018 %Y A161442 Cf. A161440, A161441, A161443, A161444, A161445, A161446, A161447, A161448, A161449, A161450, A161451, A161452, A161453, A161454, A161455. %K A161442 nonn,easy %O A161442 1,1 %A A161442 _Reinhard Zumkeller_, Jun 10 2009