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A213860
Number of free poly-IH22-tiles (holes allowed) with n cells.
0
1, 3, 8, 30, 106, 413, 1616, 6525, 26588, 109900, 457964, 1924270, 8135692, 34592460, 147780810
(list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
REFERENCES
Branko Grünbaum and G. C. Shephard, Tilings and Patterns. W. H. Freeman, New York, 1987, Sections 6.2 and 9.4.
LINKS
Table of n, a(n) for n=1..15.
CROSSREFS
Sequence in context: A221537 A148888 A151440 * A360991 A361135 A348662
Adjacent sequences: A213857 A213858 A213859 * A213861 A213862 A213863
KEYWORD
hard,more,nonn
AUTHOR
Joseph Myers, Jun 26 2012
STATUS
approved

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Last modified November 7 22:02 EST 2024. Contains 377536 sequences.
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