id:A118005 - OEIS Search Results

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((-1)^n*5^(n+1) + 9^(n+1))/14.

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1, 4, 61, 424, 4441, 36844, 347221, 3046864, 27812401, 248358484, 2244991981, 20156099704, 181649037961, 1633620638524, 14708689262341, 132347685782944, 1191281759937121, 10720772899980964, 96490770797094301 (list; graph; listen)

	OFFSET	`0,2`
	COMMENT	`Number of black cells after n iterations of Haferman's carpet.`
	LINKS	`Eric Weisstein's World of Mathematics, Haferman Carpet`
	CROSSREFS	`Sequence in context: A158300 A129452 A131014 this_sequence A132064 A102193 A166028` `Adjacent sequences: A118002 A118003 A118004 this_sequence A118006 A118007 A118008`
	KEYWORD	`nonn`
	AUTHOR	`Eric Weisstein (eric(AT)weisstein.com), Apr 09, 2006`

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

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