a(n) is the difference between denominator and numerator of the n-th alternating harmonic number Sum_{k=1..n} (-1)^(k+1)/k = A058313(n)/A058312(n).

A119248

a(n) is the difference between denominator and numerator of the n-th alternating harmonic number Sum_{k=1..n} (-1)^(k+1)/k = A058313(n)/A058312(n).

Terms

    a(0) =0a(1) =1a(2) =1a(3) =5a(4) =13a(5) =23a(6) =101a(7) =307a(8) =641a(9) =893a(10) =7303a(11) =9613a(12) =97249a(13) =122989a(14) =19793a(15) =48595a(16) =681971a(17) =818107a(18) =13093585a(19) =77107553a(20) =66022193a(21) =76603673a(22) =1529091919a(23) =1752184789a(24) =7690078169a(25) =8719737569a(26) =23184641107a(27) =3721854001a(28) =96460418429

External references