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 A074046 #4 Jan 01 2013 12:10:43 %S A074046 1,1,2,5,17,129,2923,428951,1309535519,565555596556379, %T A074046 740857737860237412264699,418997210078479016314891376985981834403, %U A074046 310417325465458849274468827944195726858840449351291150876911355 %N A074046 a(n)=a(n-1)*a(n-2)*a(n-3)*(1/a(n-1)+1/a(n-2)+1/a(n-3)) starting with a(1)=a(2)=1 and a(3)=2. %F A074046 a(n) tends towards a(n-1)^phi and 1.31809...^(phi^n) where phi=(1+sqrt(5))/2=1.6180339887... %F A074046 a(n)=a(n-1)*a(n-2)+a(n-3)*a(n-1)+a(n-2)*a(n-3). - _M. F. Hasler_, Jan 01 2013 %e A074046 a(6)=17*5*2*(1/17+1/5+1/2)=129. %Y A074046 Cf. A074047. In more than one sense A074046 comes between A000045 and A057438. %Y A074046 See also A121810 and A203761 and references therein. %K A074046 nonn %O A074046 1,3 %A A074046 _Henry Bottomley_, Aug 14 2002