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 A167251 #8 Jul 22 2025 07:27:09 %S A167251 1,8,62,454,4006,33344,270827,2152050,15661597,113764225,757566033 %N A167251 Number of ways to partition an n X 5 grid into 5 connected equal-area regions. %F A167251 a(n) = A167261(n,5). - _R. J. Mathar_, Oct 13 2024 %e A167251 Some solutions for n=3 %e A167251 ...1.1.2.2.2...1.1.1.2.3...1.2.3.4.4...1.1.2.2.3...1.1.1.2.3...1.2.2.2.3 %e A167251 ...3.1.4.5.5...4.5.5.2.3...1.2.3.5.4...1.4.2.3.3...4.4.5.2.3...1.4.4.4.3 %e A167251 ...3.3.4.4.5...4.4.5.2.3...1.2.3.5.5...4.4.5.5.5...4.5.5.2.3...1.5.5.5.3 %e A167251 ------ %e A167251 ...1.1.2.2.2...1.1.1.2.2...1.1.2.2.3...1.2.2.3.3...1.1.2.3.3...1.2.3.3.4 %e A167251 ...1.3.4.4.4...3.4.4.5.2...4.1.2.3.3...1.1.2.3.4...4.1.2.3.5...1.2.3.5.4 %e A167251 ...3.3.5.5.5...3.3.4.5.5...4.4.5.5.5...5.5.5.4.4...4.4.2.5.5...1.2.5.5.4 %e A167251 ------ %e A167251 ...1.2.2.3.3...1.2.3.4.5...1.2.2.2.3...1.2.2.3.3...1.2.3.3.3...1.2.2.3.4 %e A167251 ...1.2.4.5.3...1.2.3.4.5...1.1.4.4.3...1.2.4.3.5...1.2.4.4.5...1.2.3.3.4 %e A167251 ...1.4.4.5.5...1.2.3.4.5...5.5.5.4.3...1.4.4.5.5...1.2.4.5.5...1.5.5.5.4 %e A167251 ------ %e A167251 ...1.1.2.3.3...1.1.2.2.2...1.1.2.3.4...1.1.2.2.3...1.1.2.2.2...1.1.2.3.3 %e A167251 ...1.2.2.4.3...1.3.4.5.5...1.5.2.3.4...4.1.2.5.3...3.1.4.4.4...1.4.2.2.3 %e A167251 ...5.5.5.4.4...3.3.4.4.5...5.5.2.3.4...4.4.5.5.3...3.3.5.5.5...4.4.5.5.5 %K A167251 nonn %O A167251 1,2 %A A167251 _R. H. Hardin_ Oct 31 2009