id:A128060 - OEIS Search Results

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a(n)=2n-numerator((2n-1)^2/(2*(2n)!)).

+0
1

-1, 1, 1, 1, 1, 9, 1, 1, 15, 1, 1, 21, 1, 25, 27, 1, 1, 33, 35, 1, 39, 1, 1, 45, 1, 49, 51, 1, 55, 57, 1, 1, 63, 65, 1, 69, 1, 1, 75, 77, 1, 81, 1, 85, 87, 1, 91, 93, 95, 1, 99, 1, 1, 105, 1, 1, 111, 1, 115, 117, 119, 121, 123 (list; graph; listen)

	OFFSET	`0,6`
	COMMENT	`Non-odd primes with placeholders for primes between them.`
	FORMULA	`a(n)=2n-A128059(n);`
	CROSSREFS	`Sequence in context: A072224 A085660 A092578 this_sequence A143681 A081582 A144404` `Adjacent sequences: A128057 A128058 A128059 this_sequence A128061 A128062 A128063`
	KEYWORD	`easy,sign`
	AUTHOR	`Paul Barry (pbarry(AT)wit.ie), Feb 13 2007`

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Last modified December 15 00:47 EST 2009. Contains 170825 sequences.

AT&T Labs Research