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 A178893 #5 Aug 02 2015 12:51:39 %S A178893 0,7,14,19,28,31,38,47,56,63,62,75,76,79,94,95,112,119,126,115,124, %T A178893 127,150,159,152,159,158,187,188,191,190,191,224,231,238,243,252,255, %U A178893 230,239,248,255,254,299,300,303,318,319,304,311,318,307,316,319,374,383 %N A178893 a(n) = n OR 6n, where OR is bitwise OR. %t A178893 f[n_] := BitOr[n, 6n]; Array[f, 56, 0] (* _Robert G. Wilson v_, Jun 28 2010 *) %Y A178893 Cf. A163617, A178890, A178891, A178892, A178894, A178895, A178896, A178897. %K A178893 nonn %O A178893 0,2 %A A178893 _Dmitry Kamenetsky_, Jun 21 2010 %E A178893 More terms from _Robert G. Wilson v_, Jun 28 2010