(n-1)-st elementary symmetric function of {2,4,6,8,...,2n}.

A203159

(n-1)-st elementary symmetric function of {2,4,6,8,...,2n}.

Terms

    a(0) =1a(1) =6a(2) =44a(3) =400a(4) =4384a(5) =56448a(6) =836352a(7) =14026752a(8) =262803456a(9) =5441863680a(10) =123436892160

External references