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 A110381 #4 Dec 05 2013 19:57:02 %S A110381 1,11,11,111,1221,1221,12221,123321,1356531,1356531,13566531, %T A110381 135787531,1370219631,15072415941,15072415941,150725515941, %U A110381 1507390825941,15087488356941,152246473420041,1674711207620451,1674711207620451 %N A110381 a(n) = corresponding product of parts in A110380. %e A110381 Using n ones and only the * sign we get the following sums. %e A110381 1 a(1) = 1 %e A110381 11 a(2) =11 %e A110381 1*11 a(3) = 11 %e A110381 1 *111 a(4) =111 %e A110381 11*111 a(5) = 1221 %e A110381 1*11*111 a(6) =1221 %e A110381 1*11*1111 a(7) =12221 %e A110381 1*111*1111 %e A110381 11*111*1111 %Y A110381 Cf. A110380. %K A110381 base,easy,nonn %O A110381 1,2 %A A110381 _Amarnath Murthy_, Jul 25 2005 %E A110381 More terms from _Joshua Zucker_, May 08 2006