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 A167258 #9 Jul 22 2025 07:27:59 %S A167258 1,34,1173,40899,1696781,81459922,3825111851,187497290034 %N A167258 Number of ways to partition an n X 8 grid into 8 connected equal-area regions. %F A167258 a(n) = A167264(n,8). - _R. J. Mathar_, Oct 13 2024 %e A167258 Some solutions for n=3 %e A167258 ...1.1.2.3.3.4.4.4...1.2.3.3.3.4.4.4...1.2.2.2.3.3.3.4...1.1.2.3.4.5.5.6 %e A167258 ...1.2.2.5.3.6.6.7...1.2.5.6.6.7.8.8...1.1.5.5.6.7.7.4...1.2.2.3.4.5.7.6 %e A167258 ...8.8.8.5.5.6.7.7...1.2.5.5.6.7.7.8...8.8.8.5.6.6.7.4...8.8.8.3.4.7.7.6 %e A167258 ------ %e A167258 ...1.2.2.2.3.3.4.4...1.1.2.3.3.4.5.5...1.1.2.2.3.4.5.5...1.1.1.2.3.3.3.4 %e A167258 ...1.5.6.6.3.7.8.4...1.6.2.3.7.4.5.8...6.1.2.7.3.4.8.5...5.5.5.2.6.6.4.4 %e A167258 ...1.5.5.6.7.7.8.8...6.6.2.7.7.4.8.8...6.6.7.7.3.4.8.8...7.7.7.2.6.8.8.8 %e A167258 ------ %e A167258 ...1.1.2.2.3.4.5.5...1.1.1.2.2.2.3.3...1.2.3.3.3.4.5.5...1.2.3.3.4.5.5.5 %e A167258 ...1.6.2.7.3.4.8.5...4.4.4.5.6.6.3.7...1.2.2.6.6.4.7.5...1.2.3.6.4.7.7.8 %e A167258 ...6.6.7.7.3.4.8.8...8.8.8.5.5.6.7.7...1.8.8.8.6.4.7.7...1.2.6.6.4.7.8.8 %e A167258 ------ %e A167258 ...1.2.3.4.4.5.6.6...1.1.2.3.4.4.5.6...1.1.2.3.3.3.4.4...1.1.2.2.2.3.4.4 %e A167258 ...1.2.3.4.7.5.8.6...1.7.2.3.4.8.5.6...5.1.2.6.7.7.4.8...5.1.6.7.7.3.4.8 %e A167258 ...1.2.3.7.7.5.8.8...7.7.2.3.8.8.5.6...5.5.2.6.6.7.8.8...5.5.6.6.7.3.8.8 %Y A167258 Intersects with A172477. [From _Johan de Ruiter_, Feb 04 2010] %K A167258 nonn %O A167258 1,2 %A A167258 _R. H. Hardin_ Oct 31 2009 %E A167258 a(8) added by _Johan de Ruiter_, Feb 04 2010