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 A167255 #8 Jul 22 2025 07:27:38 %S A167255 1,21,441,9157,214689,5850115,158753814,4292655082 %N A167255 Number of ways to partition an n X 7 grid into 7 connected equal-area regions. %F A167255 a(n) = A167263(n,7). - _R. J. Mathar_, Oct 13 2024 %e A167255 Some solutions for n=4 %e A167255 ...1.1.1.2.3.3.3...1.2.2.2.3.3.4...1.1.1.1.2.2.3...1.2.2.2.2.3.4 %e A167255 ...1.4.4.2.2.5.3...1.2.5.5.5.3.4...4.4.4.4.5.2.3...1.5.6.6.3.3.4 %e A167255 ...6.6.4.4.2.5.5...1.6.6.6.5.3.4...6.7.7.7.5.2.3...1.5.6.6.7.3.4 %e A167255 ...6.6.7.7.7.7.5...1.6.7.7.7.7.4...6.6.6.7.5.5.3...1.5.5.7.7.7.4 %e A167255 ------ %e A167255 ...1.1.1.1.2.2.3...1.2.2.3.4.4.4...1.2.3.3.3.4.4...1.1.2.2.2.3.3 %e A167255 ...4.4.5.2.2.6.3...1.1.2.3.3.4.5...1.2.2.3.5.4.4...4.1.5.2.6.7.3 %e A167255 ...4.5.5.5.6.6.3...6.1.2.3.7.5.5...1.2.6.6.5.7.7...4.1.5.6.6.7.3 %e A167255 ...4.7.7.7.7.6.3...6.6.6.7.7.7.5...1.6.6.5.5.7.7...4.4.5.5.6.7.7 %e A167255 ------ %e A167255 ...1.1.1.2.3.4.4...1.1.1.1.2.3.3...1.2.2.3.4.5.5...1.1.1.2.2.3.3 %e A167255 ...5.1.2.2.3.6.4...4.4.2.2.2.5.3...1.2.2.3.4.5.5...1.4.2.2.5.5.3 %e A167255 ...5.5.5.2.3.6.4...4.6.6.6.6.5.3...1.1.6.3.4.7.7...6.4.4.4.5.5.3 %e A167255 ...7.7.7.7.3.6.6...4.7.7.7.7.5.5...6.6.6.3.4.7.7...6.6.6.7.7.7.7 %K A167255 nonn %O A167255 1,2 %A A167255 _R. H. Hardin_ Oct 31 2009