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 A062285 #7 Feb 14 2017 23:07:02 %S A062285 0,2,4,6,8,21,23,25,27,29,41,43,45,47,49,61,63,65,67,69,81,83,85,87, %T A062285 89,210,212,214,216,218,230,232,234,236,238,250,252,254,256,258,270, %U A062285 272,274,276,278,290,292,294,296,298,410,412,414,416,418,430,432,434,436 %N A062285 Numbers with the most significant digit even and alternating parity of digits. %H A062285 Reinhard Zumkeller, <a href="/A062285/b062285.txt">Table of n, a(n) for n = 1..10000</a> %H A062285 <a href="/index/Ar#10-automatic">Index entries for 10-automatic sequences</a>. %F A062285 (1 - A000030(a(n)) mod 2) * A228710(a(n)) = 1. - _Reinhard Zumkeller_, Aug 31 2013 %e A062285 4325 is a member as the most significant digit is 4 (even) and the subsequent digits 3, 2, 5 are alternately odd and even. %o A062285 (Haskell) %o A062285 a062285 n = a062285_list !! (n-1) %o A062285 a062285_list = filter (even . a000030) a030141_list %o A062285 -- _Reinhard Zumkeller_, Aug 31 2013 %Y A062285 Cf. A030142, A030143. %K A062285 nonn,base,easy %O A062285 1,2 %A A062285 _Amarnath Murthy_, Jun 18 2001 %E A062285 Corrected and extended by Larry Reeves (larryr(AT)acm.org), Jun 19 2001 %E A062285 Offset corrected by and a(1)=0 prepended by _Reinhard Zumkeller_, Aug 31 2013