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 A167903 #2 Mar 30 2012 18:51:05 %S A167903 4,8,9,12,18,12,8,18,25,20,16,20,25,32,40,45,40,32,36,40,44,45,36,40, %T A167903 50,54,60,63,60,56,60,63,64,72,75,72,75,76,75,80,84,88,92,96,99,92,88, %U A167903 90,92,99,104,108,112,116,117,112,116,125,124,117,108,112,124,132,135,132 %N A167903 A075380(n) + A075380(n+1). %C A167903 A008966(a(n)) = 0 by definition of A075380. %Y A167903 Cf. A167907. %K A167903 nonn %O A167903 1,1 %A A167903 _Reinhard Zumkeller_, Nov 15 2009