id:A163456 - OEIS Search Results

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A163455(n)/4.

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1, 9, 91, 969, 10626, 118755, 1344904, 15380937, 177232627, 2054455634, 23930713170, 279871768995, 3284214703056, 38650751381832, 456002537343216, 5391644226101705, 63871405575418665, 757929628541719755 (list; graph; listen)

	OFFSET	`1,2`
	FORMULA	`a(n)=(5n-1)!/(4*n!(4n-1)!).`
	CROSSREFS	`Sequence in context: A014992 A015585 A109108 this_sequence A123792 A022520 A020236` `Adjacent sequences: A163453 A163454 A163455 this_sequence A163457 A163458 A163459`
	KEYWORD	`nonn`
	AUTHOR	`Zak Seidov (zakseidov(AT)yahoo.com), Jul 28 2009`

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

AT&T Labs Research