Define a sequence u(n) by u(1)=1; thereafter u(n) = f(n)/f(n-1) where f(n) = (-1)^(n+1)*A105750(n); sequence gives numerator(u(n)).

A220448

Define a sequence u(n) by u(1)=1; thereafter u(n) = f(n)/f(n-1) where f(n) = (-1)^(n+1)*A105750(n); sequence gives numerator(u(n)).

Terms

    a(0) =1a(1) =1a(2) =-10a(3) =-1a(4) =19a(5) =-73a(6) =662a(7) =-2795a(8) =281a(9) =-4511a(10) =21746a(11) =-322921a(12) =1035215a(13) =-720817a(14) =1077518a(15) =-87995911a(16) =-34376687a(17) =929280875a(18) =-92673902a(19) =6986985769a(20) =-33833494045a(21) =243540693677

External references