A163456 - OEIS

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A163456

A163455(n)/4.

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

	OFFSET	`1,2`
	FORMULA	`a(n)=(5n-1)!/(4*n!(4n-1)!).`
	CROSSREFS	`Sequence in context: A014992 A015585 A109108 * A176735 A123792 A022520` `Adjacent sequences: A163453 A163454 A163455 * A163457 A163458 A163459`
	KEYWORD	`nonn`
	AUTHOR	`Zak Seidov (zakseidov(AT)yahoo.com), Jul 28 2009`

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Last modified February 15 11:25 EST 2012. Contains 205777 sequences.