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 A020767 #6 Mar 31 2012 20:55:18
%S A020767 1,1,10,110,11000,1111000,122210000,13565310000,13565310000000,
%T A020767 13578875310000000,13714664063100000000,13865525367794100000000,
%U A020767 15252077904573510000000000,16792537772935434510000000000,18639716927958332306100000000000,20708725506961707192077100000000000
%N A020767 Product_{k=1..n} b(k), where b(k) = binary expansion of k (A007088) but read as if it were a decimal number.
%e A020767 a(4) = 1*10*11*100 = 11000.
%Y A020767 Partial products of A007088.
%K A020767 nonn,base,easy
%O A020767 0,3
%A A020767 _Susanna Cuyler_, May 23 2003