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A053878
Difference between numerator and denominator of lowest terms fraction from division of a highly composite number (1) by its predecessor.
0
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 3, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 4, 1, 1, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 11, 13, 2, 5, 11, 13, 2, 1, 5, 2, 1, 1, 1, 1, 3, 1, 1, 1, 3, 1, 1, 1
OFFSET
2,25
COMMENTS
Successive fractions are 2/1, 2/1, 3/2, 2/1, 2/1, 3/2, 4/3, 5/4, 2/1, 3/2, 4/3, 3/2, 2/1.
This sequence is not multiplicative.
FORMULA
a(n) = A054483(n)-A054482(n) =(A002182(n)-A002182(n-1))/A054481(n).
EXAMPLE
a(7)=1 since A002182(7)=36, A002182(6)=24, 36/24=3/2 in lowest terms and 3-2=1.
CROSSREFS
Cf. A002182.
Sequence in context: A370363 A249776 A348970 * A070672 A319101 A354487
KEYWORD
nonn
AUTHOR
Henry Bottomley, Mar 31 2000
EXTENSIONS
More terms from Jud McCranie, Jun 09 2005
STATUS
approved