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 A367727 #12 Dec 01 2023 15:56:15 %S A367727 -1,0,1,1,3,2,5,3,7,4,0,5,20,15,8,25,60,35,80,9,1,1,21,31,41,51,61,71, %T A367727 81,91,2,3,2,16,6,13,62,36,82,23,3,13,23,3,43,53,63,73,83,93,4,7,24, %U A367727 17,4,27,64,37,84,47,5,15,25,35,9,5,65,75,85,19,6,2,26 %N A367727 a(n) is the numerator of (R(n) - 1)/(n + 1), where R(n) is the digit reversal of n. %H A367727 Stefano Spezia, <a href="/A367727/b367727.txt">Table of n, a(n) for n = 0..10000</a> %t A367727 a[n_]:=Numerator[(FromDigits[Reverse[IntegerDigits[n]]]-1)/(n+1)]; Array[a,73,0] %o A367727 (PARI) a(n) = numerator((fromdigits(Vecrev(digits(n)))-1)/(n+1)); \\ _Michel Marcus_, Nov 28 2023 %Y A367727 Cf. A004086, A367593, A367728 (denominator). %K A367727 sign,base,easy,frac,look %O A367727 0,5 %A A367727 _Stefano Spezia_, Nov 28 2023