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 A134693 #4 Mar 30 2012 18:51:53 %S A134693 3,9,6,18,12,36,24,72,48,144,96,288,192,576,384,1152,768,2304,1536, %T A134693 4608,3072,9216,6144,18432,12288,36864,24576,73728,49152,147456,98304, %U A134693 294912,196608,589824,393216,1179648,786432,2359296,1572864,4718592,3145728 %N A134693 a(n)=A133806(n)+A133806(n+6). %F A134693 a(n)=3*A074323(n+1). %F A134693 a(2n)=A007283(n). a(2n+1)=3*A007283(n). %F A134693 O.g.f.: 3(1+3x)/(1-2x^2). - _R. J. Mathar_, Jul 22 2008 %K A134693 nonn %O A134693 0,1 %A A134693 _Paul Curtz_, Jan 27 2008 %E A134693 Edited and extended by _R. J. Mathar_, Jul 22 2008