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 A161447 #4 Jan 25 2018 10:01:30 %S A161447 7,22,37,52,67,82,97,112,143,158,173,188,203,218,233,248,262,279,292, %T A161447 309,322,339,352,369,398,415,428,445,458,475,488,505,517,532,551,566, %U A161447 577,592,611,626,653,668,687,702,713,728,747,762,772,789,806,823,832 %N A161447 Numbers n such that A160700(n) = 7. %H A161447 Charles R Greathouse IV, <a href="/A161447/b161447.txt">Table of n, a(n) for n = 1..10000</a> %F A161447 16n - 16 <= a(n) <= 16n - 1. - _Charles R Greathouse IV_, Jan 25 2018 %o A161447 (PARI) A160700(n)=my(t=n%16); while(n>15, n>>=4; t=bitxor(t, n%16)); t %o A161447 a(n)=for(k=16*n-16, 16*n-1, if(a(k)==7, return(k))) \\ _Charles R Greathouse IV_, Jan 25 2018 %Y A161447 Cf. A161440, A161441, A161442, A161443, A161444, A161445, A161446, A161448, A161449, A161450, A161451, A161452, A161453, A161454, A161455. %K A161447 nonn,easy %O A161447 1,1 %A A161447 _Reinhard Zumkeller_, Jun 10 2009