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 A072672 #3 Mar 30 2012 18:50:24 %S A072672 11,31,83,159,359,531,791,1079,1487,2159,2559,3419,4283,4751,5471, %T A072672 7127,8399,9423,11151,12527,13467,15519,16799,20159,22539,24479,26207, %U A072672 28511,29919,32147,37631,41183,43883,47319,52499,54719,59091,62975,66863 %N A072672 Prime(n)*prime(2*n)+prime(n)+prime(2*n). %e A072672 a(10) = A000040(10)*A000040(20)+A000040(10)+A000040(20) = 29*71+29+71 = 2159. %Y A072672 Cf. A072668, A072673. %K A072672 nonn %O A072672 1,1 %A A072672 _Reinhard Zumkeller_, Jun 30 2002