A124997 - OEIS

This site is supported by donations to The OEIS Foundation.

A124997

Number of fault-free domino tilings (or dimer coverings) of a 2n X 2n square.

0, 0, 0, 25506, 1759280998, 854818404562894 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,4`
	COMMENTS	`Enumerates a subclass of the things counted by A004003.` `"Fault-free" means that every straight line through the interior of the square hits the interior of some domino.`
	CROSSREFS	`Cf. A004003.` `Sequence in context: A175741 A203090 A183648 * A031837 A202646 A184027` `Adjacent sequences: A124994 A124995 A124996 * A124998 A124999 A125000`
	KEYWORD	`nonn`
	AUTHOR	`D. E. Knuth, Jun 26 2008`

Content is available under The OEIS End-User License Agreement .

Last modified February 17 12:38 EST 2012. Contains 206021 sequences.