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A162678 Number of fixed strictly disconnected n-ominoes bounded (not necessarily tightly) by an n*n square 0
0, 2, 42, 937, 26427, 937126, 40290848, 2036152559, 118202398712, 7747410863508, 565695467280668, 45525704815211707, 4002930269942820774, 381750656962679848234, 39244733577786597223238 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
a(n) = A162676(n) - A001168(n)
LINKS
EXAMPLE
a(2)=2: the two rotations of the disconnected domino consisting of two squares connected at a vertex
CROSSREFS
Sequence in context: A287328 A276923 A308526 * A265867 A259550 A177456
KEYWORD
nonn
AUTHOR
David Bevan, Jul 28 2009
STATUS
approved

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Last modified February 24 05:49 EST 2024. Contains 370293 sequences. (Running on oeis4.)