id:A098512 - OEIS Search Results

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Second column and sub-diagonal of number triangle A098509.

+0
3

1, 1, 1, 5, 7, 42, 22, 429, 715, 4862, 8398, 58786, 52003, 742900, 1337220, 646323, 17678835, 129644790, 79606450, 1767263190, 328206021, 8155422340, 45741281820, 343059613650, 107492012277, 4861946401452, 9183676536076 (list; graph; listen)

	OFFSET	`0,4`
	FORMULA	`a(n)=denominator(n(n+1)/binomial(2n, n))` `a(n)=denominator(n/C(n)) - Paul Barry (pbarry(AT)wit.ie), Nov 17 2004`
	CROSSREFS	`Cf. A093526, A093527, A000108.` `Sequence in context: A120298 A117751 A093526 this_sequence A064082 A090520 A066219` `Adjacent sequences: A098509 A098510 A098511 this_sequence A098513 A098514 A098515`
	KEYWORD	`easy,nonn`
	AUTHOR	`Paul Barry (pbarry(AT)wit.ie), Sep 11 2004`

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Last modified December 10 12:37 EST 2009. Contains 170569 sequences.

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