A111777 - OEIS

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A111777

Fourth column (m=3) of unsigned triangle A111595.

1, 12, 130, 1380, 15435, 182280, 2302020, 30958200, 444230325, 6771510900, 109568809350, 1874844071100, 33875023557375, 644264598978000, 12877256933541000, 269789087886318000, 5915648230774907625 (list; graph; refs; listen; history; internal format)

	OFFSET	`3,2`
	FORMULA	`E.g.f. (1/sqrt(1-x^2))((x/(1-x))^3)/3!.` `a(n)=(n!/3!)sum(binomial(2k, k)binomial(n-2*k-1, 2)/(4^k), k=0..floor((n-3)/2)), n>=3.`
	CROSSREFS	`Sequence in context: A199037 A099157 A163414 * A160962 A097783 A078218` `Adjacent sequences: A111774 A111775 A111776 * A111778 A111779 A111780`
	KEYWORD	`nonn,easy`
	AUTHOR	`Wolfdieter Lang (wolfdieter.lang_AT_physik_DOT_uni-karlsruhe_DOT_de), Aug 23 2005`

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Last modified February 16 20:47 EST 2012. Contains 205965 sequences.