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 A248390 #20 Oct 24 2015 12:01:24 %S A248390 4,9,8,15,14,25,27,16,49,121,169,85,57,32,161,319,403,125,289,81,361, %T A248390 64,259,529,451,841,559,961,235,901,177,1159,128,343,1369,1541,781, %U A248390 1681,2117,1027,1849,2573,445,2209,1649,2809,243,1121,122,707 %N A248390 Composite terms in A247665 in order of appearance. %H A248390 Russ Cox and N. J. A. Sloane, <a href="/A248390/b248390.txt">Table of n, a(n) for n = 1..19456</a> %Y A248390 Cf. A247665, A248388, A248391. %K A248390 nonn,look %O A248390 1,1 %A A248390 _Russ Cox_ and _N. J. A. Sloane_, Oct 16 2014