id:A124997 - OEIS Search Results

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

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0, 0, 0, 25506, 1759280998, 854818404562894 (list; graph; listen)

	OFFSET	`1,4`
	COMMENT	`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: A076583 A046709 A130615 this_sequence A031837 A023350 A115535` `Adjacent sequences: A124994 A124995 A124996 this_sequence A124998 A124999 A125000`
	KEYWORD	`nonn`
	AUTHOR	`D. E. Knuth, Jun 26 2008`

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Last modified August 19 23:53 EDT 2008. Contains 142930 sequences.