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A197157 Number of one-sided poly-[3^3.4^2]-tiles (polyhouses) (holes allowed) with n cells. 2
1, 4, 8, 34, 106, 430, 1616, 6594, 26588, 110188, 457964, 1925498, 8135692, 34597729, 147780810 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

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 (gives a(1)-a(10)).

CROSSREFS

Cf. A197156, A197158.

Sequence in context: A149105 A149106 A149107 * A324410 A218628 A149108

Adjacent sequences:  A197154 A197155 A197156 * A197158 A197159 A197160

KEYWORD

hard,nonn

AUTHOR

Joseph Myers, Oct 10 2011

STATUS

approved

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Last modified June 14 05:51 EDT 2021. Contains 345018 sequences. (Running on oeis4.)