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 A375131 #7 Jul 31 2024 11:33:37 %S A375131 1,1,2,6,22,108,668,5026,43005,389803 %N A375131 Number of trivalent dissections of a rectangle into n rectangles. %C A375131 Among the dissections counted by A375129, this sequence counts only those without 4-way junctions. See A375129 for the details. %D A375131 J. P. Steadman, Architectural Morphology, Pion Limited, 1983. See Table 5.2 on p. 59. %Y A375131 Cf. A049021, A340984, A342141, A375129, A375130, A375132. %K A375131 nonn,more %O A375131 1,3 %A A375131 _Andrey Zabolotskiy_, Jul 31 2024