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A375131
Number of trivalent dissections of a rectangle into n rectangles.
4
1, 1, 2, 6, 22, 108, 668, 5026, 43005, 389803
OFFSET
1,3
COMMENTS
Among the dissections counted by A375129, this sequence counts only those without 4-way junctions. See A375129 for the details.
REFERENCES
J. P. Steadman, Architectural Morphology, Pion Limited, 1983. See Table 5.2 on p. 59.
CROSSREFS
KEYWORD
nonn,more
AUTHOR
Andrey Zabolotskiy, Jul 31 2024
STATUS
approved