a(n) = Product_{k in M_n} k; M_n = {k | 1 <= k <= 2n and k mod 2 = n mod 2}.
A190901
a(n) = Product_{k in M_n} k; M_n = {k | 1 <= k <= 2n and k mod 2 = n mod 2}.
Terms
- a(0) =1a(1) =1a(2) =8a(3) =15a(4) =384a(5) =945a(6) =46080a(7) =135135a(8) =10321920a(9) =34459425a(10) =3715891200a(11) =13749310575
External references
- oeis: A190901