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A197158 Number of fixed poly-[3^3.4^2]-tiles (polyhouses) (holes allowed) with n cells. 2
2, 5, 16, 57, 212, 817, 3232, 13018, 53176, 219680, 915928, 3848079, 16271384, 69183099, 295561620 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

REFERENCES

Branko Gr├╝nbaum and G. C. Shephard, Tilings and Patterns. W. H. Freeman, New York, 1987, Sections 2.7, 6.2 and 9.4.

LINKS

Table of n, a(n) for n=1..15.

Brendan Owen, Polyhouses.

CROSSREFS

Cf. A197156, A197157.

Sequence in context: A180678 A072110 A323229 * A188314 A114296 A121689

Adjacent sequences:  A197155 A197156 A197157 * A197159 A197160 A197161

KEYWORD

hard,nonn

AUTHOR

Joseph Myers, Oct 10 2011

STATUS

approved

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Last modified June 21 00:55 EDT 2021. Contains 345329 sequences. (Running on oeis4.)