id:A140812 - OEIS Search Results

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A051717(2n)+A051717(2n+1).

+0
2

3, 9, 60, 84, 60, 132, 5460, 12, 1020, 1596, 660, 276, 5460, 12, 1740, 28644, 1020, 12, 3838380, 12, 27060, 3612, 1380, 564, 92820, 132, 3180, 1596, 1740, 708, 113573460, 12, 1020, 129444, 60, 9372, 280201740, 12, 60, 6636, 460020, 996, 6808620, 12, 122820 (list; graph; listen)

	OFFSET	`0,1`
	COMMENT	`All terms are multiples of 3.`
	MAPLE	`C:=proc(n) if n=0 then RETURN(1); fi; if n mod 2 = 0 then RETURN(bernoulli(n)+bernoulli(n-1)); else RETURN(-bernoulli(n)-bernoulli(n-1)); fi; end:` `A051717 := proc(n) denom(C(n)) ; end: A140812 := proc(n) A051717(2n)+A051717(2n+1) ; end: seq(A140812(n), n=0..80) ; # R. J. Mathar, Jun 28 2009`
	CROSSREFS	`Cf. A129826, A140333.` `Sequence in context: A040175 A105466 A018504 this_sequence A018513 A143761 A064703` `Adjacent sequences: A140809 A140810 A140811 this_sequence A140813 A140814 A140815`
	KEYWORD	`nonn`
	AUTHOR	`Paul Curtz (bpcrtz(AT)free.fr), Jul 16 2008`
	EXTENSIONS	`Edited and extended by R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Jun 28 2009`

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Last modified December 17 19:39 EST 2009. Contains 170821 sequences.

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