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 A177426 #5 Dec 20 2019 11:05:02
%S A177426 12,18,72,108,192,432,600,1152,1620,1872,2088,2268,2592,3168,4050,
%T A177426 4800,7128,7488,9432,9720,10008,13932,15972,17208,18288,20232,21492,
%U A177426 21600,23040,23832,25848,26892,27108,27792,31392,32832,33588,33750,34128
%N A177426 Average of twin prime pairs with multiple and strictly distinct powers.
%H A177426 Amiram Eldar, <a href="/A177426/b177426.txt">Table of n, a(n) for n = 1..10000</a>
%e A177426 12 = 2^2*3, 18 = 2*3^2, ... 600 = 2^3*3*5^2, ... 158760 = 2^3*3^4*5*7^2, ...
%t A177426 f[n_]:=Sort[Last/@FactorInteger[n]];lst={};Do[If[Length[f[n]]>1&&f[n]==Union@f[n]&&PrimeQ[n-1]&&PrimeQ[n+1],AppendTo[lst,n]],{n,0,5*8!}];lst
%Y A177426 Cf. A001358, A014574, A177425.
%K A177426 nonn
%O A177426 1,1
%A A177426 _Vladimir Joseph Stephan Orlovsky_, May 07 2010