A063650 - OEIS

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A063650

Number of ways to tile a 6 X n rectangle with 1 X 1 and 2 X 2 tiles.

1, 13, 43, 269, 1213, 6427, 31387, 159651, 795611, 4005785, 20064827, 100764343, 505375405, 2536323145, 12724855013, 63851706457, 320373303983, 1607526474153, 8065864257905, 40471399479495, 203068825478591 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,2`
	FORMULA	`G.f.: x(4x^5+x^4-26x^3+x^2+11x+1)/(-4x^6-x^5+27x^4-x^3-16x^2-2x+1).` `a(n) = 2a(n-1) + 16a(n-2) + a(n-3) - 27a(n-4) + a(n-5) + 4a(n-6) - Keith Schneider (kschneid(AT)bulldog.unca.edu), Apr 02 2006`
	CROSSREFS	`A001045, A054854, A054855, A063650-A063654.` `Sequence in context: A067260 A135241 A104115 * A144236 A082689 A123294` `Adjacent sequences: A063647 A063648 A063649 * A063651 A063652 A063653`
	KEYWORD	`nonn`
	AUTHOR	`Reiner Martin (reinermartin(AT)hotmail.com), Jul 23 2001`

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Last modified February 16 23:45 EST 2012. Contains 205978 sequences.