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A243511 Number of ways half the maximal number of domicules can be placed on an n X n square. 2
1, 1, 6, 110, 18343, 9382388, 43019044258, 558605693874364, 66236678406528448449, 21324218858696872235790649, 63694548993039561351614359349824, 503614181552476916158019971522161589536, 37393123107750749849065997795023579513072683993, 7226766277015485498828489748946241590630740791829515424 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,3
LINKS
FORMULA
a(n) = A243424(n,floor(n^2/4)).
EXAMPLE
a(2) = 6:
+---+ +---+ +---+ +---+ +---+ +---+
|o-o| | | |o | | o| |o | | o|
| | | | || | | || | \ | | / |
| | |o-o| |o | | o| | o| |o |
+---+ +---+ +---+ +---+ +---+ +---+.
CROSSREFS
Cf. A243510.
Sequence in context: A197978 A241702 A302866 * A199222 A260026 A112499
KEYWORD
nonn
AUTHOR
Alois P. Heinz, Jun 05 2014
STATUS
approved

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Last modified March 4 02:53 EST 2024. Contains 370522 sequences. (Running on oeis4.)