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 A219608 #6 Jul 13 2013 12:04:34 %S A219608 1,3,7,9,15,19,25,31,33,39,51,57,63,67,73,79,97,103,115,121,127,129, %T A219608 135,147,153,159,195,201,207,225,231,243,249,255,259,265,271,289,295, %U A219608 307,313,319,385,391,403,409,415,451,457,463,481,487,499,505,511,513 %N A219608 Odd terms in A060142. %C A219608 a(n) = A060142(A026351(n)); %C A219608 a(n+1) - a(n) = 2 * A219609(n). %H A219608 Reinhard Zumkeller, <a href="/A219608/b219608.txt">Table of n, a(n) for n = 1..10000</a> %o A219608 (Haskell) %o A219608 a219608 n = a219608_list !! (n-1) %o A219608 a219608_list = filter odd a060142_list %K A219608 nonn %O A219608 1,2 %A A219608 _Reinhard Zumkeller_, Nov 26 2012