(n-1)-st elementary symmetric function of {2, 3, 3, 4, 4, 5, 5,...,Floor[(n+4)/2]}.
A203154
(n-1)-st elementary symmetric function of {2, 3, 3, 4, 4, 5, 5,...,Floor[(n+4)/2]}.
Terms
- a(0) =1a(1) =5a(2) =21a(3) =102a(4) =480a(5) =2688a(6) =14880a(7) =96480a(8) =622080a(9) =4613760a(10) =34110720a(11) =285586560a(12) =2386298880a(13) =22289541120a(14) =207921530880
External references
- oeis: A203154