id:A084480 - OEIS Search Results

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Number of tilings of (4 X 2n) rectangle with L tetrominoes.

+0
5

2, 10, 42, 182, 790, 3432, 14914, 64814, 281680, 1224182, 5320310, 23122148, 100489226, 436727814, 1898026232, 8248853134, 35849651070, 155803171860, 677123141810, 2942788286798, 12789406189672, 55582969192486 (list; graph; listen)

	OFFSET	`1,1`
	LINKS	`C. Moore, [math/9905012] Some Polyomino Tilings of the Plane`
	FORMULA	`G.f. -1 + (1-2z-z^3)/(1-4z-2z^2+z^3+4z^4+4z^5+2z^6).`
	CROSSREFS	`Cf. A084478, A084479, A084477, A084481.` `Adjacent sequences: A084477 A084478 A084479 this_sequence A084481 A084482 A084483` `Sequence in context: A024483 A084180 A020988 this_sequence A099553 A119694 A121949`
	KEYWORD	`nonn,easy`
	AUTHOR	`Ralf Stephan (ralf(AT)ark.in-berlin.de), May 27 2003`

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Last modified October 13 20:18 EDT 2008. Contains 145016 sequences.

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