id:A054147 - OEIS Search Results

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T(2n,n), array T as in A054144.

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0, 3, 21, 108, 492, 2100, 8604, 34272, 133728, 513648, 1948560, 7318080, 27256896, 100815936, 370684608, 1355996160, 4938304512, 17914202880, 64760732928, 233390693376, 838784916480, 3006980379648, 10755352869888 (list; graph; listen)

	OFFSET	`0,2`
	FORMULA	`G.f.: (-3x^2+3x)/(1-4x+2x^2)^2.`
	CROSSREFS	`Sequence in context: A128281 A034268 A140451 this_sequence A043012 A122120 A080952` `Adjacent sequences: A054144 A054145 A054146 this_sequence A054148 A054149 A054150`
	KEYWORD	`nonn`
	AUTHOR	`Clark Kimberling (ck6(AT)evansville.edu), Mar 18 2000`

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Last modified November 29 12:46 EST 2009. Contains 167659 sequences.

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