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 A057439 #2 Mar 31 2012 13:50:42 %S A057439 0,1,14,38,44,46,84,86,90,94,96,100,104,106,154,156,160,162,164,166, %T A057439 170,172,174,176,178,180,182,184,188,190,192,196,198,200,202,258,260, %U A057439 262,264,266,268,270,272,274,276,278,280,282,284,286,288,290,292,294 %N A057439 Values of S from sequence A007773. %e A057439 A007773(4)= 3: 0,2,1,3 -> 38; 0,1,2,3 -> 44; 0,1,3,2 ->46 %Y A057439 Cf. A007773. %K A057439 nonn %O A057439 1,3 %A A057439 Larry Reeves (larryr(AT)acm.org), Sep 08 2000 %E A057439 More terms from _Naohiro Nomoto_, Oct 29 2001