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 A361525 #8 Mar 19 2023 08:29:20 %S A361525 1,3,17,54,892,8159,80021,791821,7906439,79069308 %N A361525 Number of ways of dividing an n X 3 rectangle into integer-sided rectangles, up to rotations and reflections. %F A361525 a(n) >= A208215(n)/4 for n != 3. %F A361525 a(n) ~ A208215(n)/4. %Y A361525 Third column of A361523. %Y A361525 Cf. A208215 (rotations and reflections are considered distinct), A359019 (square pieces), A360632. %K A361525 nonn,more %O A361525 0,2 %A A361525 _Pontus von Brömssen_, Mar 15 2023