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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

Table of n, a(n) for n=0..13.

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

Adjacent sequences:  A243508 A243509 A243510 * A243512 A243513 A243514

KEYWORD

nonn

AUTHOR

Alois P. Heinz, Jun 05 2014

STATUS

approved

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Last modified June 14 15:19 EDT 2021. Contains 345025 sequences. (Running on oeis4.)