(n-1)-st elementary symmetric function of {3, 3, 4, 4, 5, 5,..., Floor[(n+5)/2]}.

A203155

(n-1)-st elementary symmetric function of {3, 3, 4, 4, 5, 5,..., Floor[(n+5)/2]}.

Terms

    a(0) =1a(1) =6a(2) =33a(3) =168a(4) =984a(5) =5640a(6) =37440a(7) =246240a(8) =1853280a(9) =13880160a(10) =117391680a(11) =989936640a(12) =9315855360a(13) =87500528640a(14) =907925760000

External references