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Search: id:A153087
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| 6, 66, 114, 162, 5466, 1026, 1926, 606, 5466, 1746, 29154, 522, 3838386, 27066, 4302, 1254, 92886, 3246, 2466, 1578, 113573466, 1026, 129474, 9402, 280201746, 66, 236646, 231006, 6808626, 122826, 545646, 1422, 9003546, 66666, 10242, 2874, 418384938, 3344058
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OFFSET
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0,1
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COMMENT
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All terms are multiples of 6.
The first differences are 60,48,48,5304,-4440,... Apparently (checked for the first 700 entries) these are multiples of 12.
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MAPLE
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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: A153087 := proc(n) A051717(3*n)+A051717(3*n+1)+A051717(3*n+2) ; end: seq(A153087(n), n=0..120) ; # R. J. Mathar, Sep 07 2009
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CROSSREFS
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Cf. A051717, A140812.
Sequence in context: A122780 A153514 A119144 this_sequence A117794 A101011 A119140
Adjacent sequences: A153084 A153085 A153086 this_sequence A153088 A153089 A153090
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KEYWORD
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nonn
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AUTHOR
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Paul Curtz (bpcrtz(AT)free.fr), Dec 18 2008
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EXTENSIONS
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Extended by R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Sep 07 2009
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