Denominator of the product of n and the n-th harmonic alternating number, Sum_{k=1..n} (-1)^(k+1)/k.
A334721
Denominator of the product of n and the n-th harmonic alternating number, Sum_{k=1..n} (-1)^(k+1)/k.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =3a(4) =12a(5) =10a(6) =60a(7) =105a(8) =280a(9) =252a(10) =2520a(11) =2310a(12) =27720a(13) =25740a(14) =24024a(15) =9009a(16) =144144a(17) =136136a(18) =2450448a(19) =11639628a(20) =11085360a(21) =10581480a(22) =232792560a(23) =223092870a(24) =1070845776a(25) =1029659400a(26) =2974571600a(27) =2868336900a(28) =11473347600a(29) =11090902680
External references
- oeis: A334721