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A197461
Number of fixed poly-[3.6.3.6]-tiles (holes allowed) with n cells (division into rhombi is significant).
2
3, 6, 14, 36, 99, 281, 816, 2415, 7260, 22074, 67743, 209552, 652566, 2043672, 6431715, 20328504, 64494678, 205303537, 655493697, 2098500135, 6734498816, 21660087087
OFFSET
1,1
REFERENCES
Branko Gruenbaum and G. C. Shephard, Tilings and Patterns. W. H. Freeman, New York, 1987, Sections 2.7, 6.2 and 9.4.
CROSSREFS
Sequence in context: A147772 A129703 A001550 * A100446 A106395 A369544
KEYWORD
hard,more,nonn
AUTHOR
Joseph Myers, Oct 15 2011
EXTENSIONS
a(18)-a(22) from Aaron N. Siegel, May 16 2022
STATUS
approved