id:A001460 - OEIS Search Results

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(5*n)!/((2*n)!*(n!)^3).

+0
2

1, 60, 18900, 8408400, 4364860500, 2473653742560, 1483630051503600, 925833064837824000, 594927307937311420500, 391004487919622186610000, 261614105944603801295306400, 177601637048592673099585584000 (list; graph; listen)

	OFFSET	`0,2`
	FORMULA	`a(n)=A008978(n)/A000984(n) if n=1 then 120/2=60 - Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Jun 28 2007`
	MAPLE	`f := n->(5n)!/((2n)!(n!)^3);` `seq((5n)!/(n!)^5/binomial(2*n, n), n=0..11); - Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Jun 28 2007`
	CROSSREFS	`Cf. A000984, A008978.` `Sequence in context: A145411 A113424 A009564 this_sequence A003794 A068295 A123482` `Adjacent sequences: A001457 A001458 A001459 this_sequence A001461 A001462 A001463`
	KEYWORD	`nonn`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com).`

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

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