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 A163121 #3 Mar 30 2012 18:52:34 %S A163121 8,26,61,127,819,1468,3913,5131,9423,21014,25695,44821,60921,70246, %T A163121 93175,135053,189754,209405,281080,335959,362017,460271,535850,665665, %U A163121 869798,983645,1037855,1165724,1231029,1368809,1963199,2156966,2474017,2575027 %N A163121 (prime(n))^3-(nonprime(n))^3 . %C A163121 Cube of the n-th prime, A000040(n), minus cube of the n-th nonprime, A141468(n). %F A163121 a(n) = A030078(n)-A141468(n)^3 = A161671(n)*(A001248(n)+A000040(n)*A141468(n)+A161753(n)). %e A163121 a(1)=2^3-0^3=8. a(2)=3^3-1^2=26. a(3)=5^3-4^3=61. a(4)=7^3-6^3=127. %Y A163121 Cf. A000040, A030078, A141468, A161757. %K A163121 nonn %O A163121 1,1 %A A163121 _Juri-Stepan Gerasimov_, Jul 21 2009 %E A163121 Extended by _R. J. Mathar_, Jul 31 2009