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 A167243 #7 May 11 2016 15:06:29 %S A167243 1,3,10,23,56,132,259,546,1095,2043,3908,7379,13208,24194,43819,76790, %T A167243 136489,241311,416152,726073,1261696,2153026,3706393,6364842,10775173, %U A167243 18374181 %N A167243 Number of ways to partition an n X 3 grid into 3 connected equal-area regions. %e A167243 All solutions for n=4 %e A167243 ...1.1.2...1.1.2...1.1.2...1.1.2...1.1.2...1.1.2...1.1.1...1.1.1...1.1.1 %e A167243 ...1.2.2...1.2.2...1.1.2...1.1.2...1.3.2...3.1.2...1.2.2...1.2.2...1.2.2 %e A167243 ...1.2.3...1.3.2...3.2.2...3.3.2...1.3.2...3.1.2...2.2.3...3.2.2...3.3.2 %e A167243 ...3.3.3...3.3.3...3.3.3...3.3.2...3.3.2...3.3.2...3.3.3...3.3.3...3.3.2 %e A167243 ------ %e A167243 ...1.1.1...1.1.1...1.1.1...1.1.1...1.1.1...1.1.1...1.1.1...1.2.2...1.2.2 %e A167243 ...1.2.3...2.2.1...2.2.1...2.2.1...2.1.3...2.1.3...2.3.1...1.2.2...1.2.2 %e A167243 ...2.2.3...2.2.3...2.3.3...3.2.2...2.2.3...2.3.3...2.3.3...1.1.3...1.3.3 %e A167243 ...2.3.3...3.3.3...2.3.3...3.3.3...2.3.3...2.2.3...2.2.3...3.3.3...1.3.3 %e A167243 ------ %e A167243 ...1.2.2...1.2.2...1.2.2...1.2.2...1.2.3 %e A167243 ...1.2.3...1.1.2...1.1.2...1.3.2...1.2.3 %e A167243 ...1.2.3...1.3.2...3.1.2...1.3.2...1.2.3 %e A167243 ...1.3.3...3.3.3...3.3.3...1.3.3...1.2.3 %Y A167243 Cf. A167242. %K A167243 nonn %O A167243 1,2 %A A167243 _R. H. Hardin_, Oct 31 2009