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 A248478 #9 Oct 25 2014 22:51:34 %S A248478 12,17,18,24,27,48,71,72,77,78,111,113,114,116,119,141,144,149,169, %T A248478 216,221,222,225,226,228,252,255,281,282,288,311,325,387,411,414,441, %U A248478 442,444,447,449,474,479,497,525,526,550,556,559,562,619,621,622,649,674 %N A248478 Evil numbers (A001969) becoming odious (A000069) if any digit is deleted (zeros allowed). %H A248478 Peter J. C. Moses, <a href="/A248478/b248478.txt">Table of n, a(n) for n = 1..1000</a> %e A248478 149 is in the sequence, since 149 = 2^7 + 2^4 + 2^2 + 1 is evil, while 49, 19 and 14 are odious. %Y A248478 Cf. A000069, A001969, A248642, A248644, A248659. %K A248478 nonn,base %O A248478 1,1 %A A248478 _Vladimir Shevelev_, Oct 07 2014 %E A248478 More terms from _Peter J. C. Moses_, Oct 11 2014