cp's OEIS Frontend

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.

A167245 Number of ways to partition a 2*n X 3 grid into 6 connected equal-area regions.

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%I A167245 #10 Jun 09 2025 20:58:33
%S A167245 1,11,170,997,7670,62609,296063,1685893,9684421,41633825
%N A167245 Number of ways to partition a 2*n X 3 grid into 6 connected equal-area regions.
%F A167245 a(n) = A167262(2n,3). - _R. J. Mathar_, Oct 13 2024
%e A167245 Some solutions for n=4
%e A167245 ...1.1.2...1.1.1...1.1.2...1.1.2...1.1.1...1.2.2...1.2.2...1.2.2...1.1.1
%e A167245 ...1.2.2...2.1.3...3.1.2...1.2.2...2.3.1...1.2.2...1.1.2...1.2.2...2.1.3
%e A167245 ...1.3.2...2.3.3...3.1.2...1.2.3...2.3.3...1.3.3...1.3.2...1.3.3...2.3.3
%e A167245 ...3.3.4...2.2.3...3.4.2...4.3.3...2.3.4...1.3.3...3.3.4...1.3.3...2.4.3
%e A167245 ...3.4.4...4.4.4...3.4.4...4.4.3...2.4.4...4.4.4...5.3.4...4.4.4...2.4.4
%e A167245 ...5.4.6...5.4.6...5.5.4...5.4.6...5.4.6...4.5.5...5.6.4...4.5.5...5.4.6
%e A167245 ...5.5.6...5.5.6...6.5.5...5.6.6...5.5.6...6.5.5...5.6.4...6.6.5...5.5.6
%e A167245 ...5.6.6...5.6.6...6.6.6...5.5.6...5.6.6...6.6.6...5.6.6...6.6.5...5.6.6
%Y A167245 Cf. A167262.
%K A167245 nonn,more
%O A167245 1,2
%A A167245 _R. H. Hardin_, Oct 31 2009