A375131 Number of trivalent dissections of a rectangle into n rectangles.

1, 1, 2, 6, 22, 108, 668, 5026, 43005, 389803

Offset: 1

Author

Andrey Zabolotskiy, Jul 31 2024

Keywords

• nonn
• more

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

Cf. A049021, A340984, A342141, A375129, A375130, A375132.