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Search: id:A084060
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| A084060 |
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a(n)=1/2+(1-6n)(-1)^n/2. |
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+0
1
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| 1, 3, -5, 9, -11, 15, -17, 21, -23, 27, -29, 33, -35, 39, -41, 45, -47, 51, -53, 57, -59, 63, -65, 69, -71, 75, -77, 81, -83, 87, -89, 93, -95, 99, -101, 105, -107, 111, -113, 117, -119, 123, -125, 129, -131, 135, -137, 141, -143, 147, -149, 153, -155, 159, -161, 165, -167, 171, -173, 177, -179
(list; graph; listen)
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OFFSET
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0,2
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COMMENT
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abs(a(n+1))=A047270(n)
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FORMULA
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Unsigned version is sum of alternate terms of A032766 (numbers congruent to {0,1,3} mod 4): (1, 3, 4, 6, 7, 9, 10, 12,...) such that A084060(n) = A032766(n-1) + A032766(n+1). - Gary W. Adamson (qntmpkt(AT)yahoo.com), Sep 13 2007
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CROSSREFS
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Cf. A084056.
Cf. A032766.
Sequence in context: A003071 A109324 A047270 this_sequence A024896 A160771 A040976
Adjacent sequences: A084057 A084058 A084059 this_sequence A084061 A084062 A084063
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KEYWORD
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easy,sign
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AUTHOR
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Paul Barry (pbarry(AT)wit.ie), May 11 2003
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