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 A161455 #4 Jan 25 2018 10:07:39 %S A161455 15,30,45,60,75,90,105,120,135,150,165,180,195,210,225,240,270,287, %T A161455 300,317,330,347,360,377,390,407,420,437,450,467,480,497,525,540,559, %U A161455 574,585,600,619,634,645,660,679,694,705,720,739,754,780,797,814,831,840 %N A161455 Numbers n such that A160700(n) = 15. %H A161455 Charles R Greathouse IV, <a href="/A161455/b161455.txt">Table of n, a(n) for n = 1..10000</a> %F A161455 16n - 16 <= a(n) <= 16n - 1. - _Charles R Greathouse IV_, Jan 25 2018 %o A161455 (PARI) A160700(n)=my(t=n%16); while(n>15, n>>=4; t=bitxor(t, n%16)); t %o A161455 a(n)=for(k=16*n-16, 16*n-1, if(a(k)==15, return(k))) \\ _Charles R Greathouse IV_, Jan 25 2018 %Y A161455 Cf. A161440, A161441, A161442, A161443, A161444, A161445, A161446, A161447, A161448, A161449, A161450, A161451, A161452, A161453, A161454. %K A161455 nonn,easy %O A161455 1,1 %A A161455 _Reinhard Zumkeller_, Jun 10 2009