a(n) = numerator( Sum_{j=0..n} (j!/(2^j*floor(j/2)!)^2)^2 ).

A327495

a(n) = numerator( Sum_{j=0..n} (j!/(2^j*floor(j/2)!)^2)^2 ).

Terms

    a(0) =1a(1) =17a(2) =69a(3) =1113a(4) =17817a(5) =285297a(6) =1141213a(7) =18260633a(8) =1168681737a(9) =18699007017a(10) =74796032037

External references