Denominators of the partial alternating sums of the reciprocals of the squarefree kernel function (A007947).

A379370

Denominators of the partial alternating sums of the reciprocals of the squarefree kernel function (A007947).

Terms

    a(0) =1a(1) =2a(2) =6a(3) =3a(4) =15a(5) =30a(6) =210a(7) =105a(8) =35a(9) =70a(10) =770a(11) =1155a(12) =15015a(13) =30030a(14) =2002a(15) =1001a(16) =17017a(17) =102102a(18) =1939938a(19) =4849845a(20) =4849845a(21) =9699690a(22) =223092870a(23) =37182145a(24) =37182145a(25) =74364290a(26) =223092870a(27) =111546435a(28) =3234846615a(29) =2156564410

External references