a(1)=1, a(n) = Product_{k=2..n} P(k), where P(k) is the largest prime <= k.
A118455
a(1)=1, a(n) = Product_{k=2..n} P(k), where P(k) is the largest prime <= k.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =18a(4) =90a(5) =450a(6) =3150a(7) =22050a(8) =154350a(9) =1080450a(10) =11884950a(11) =130734450a(12) =1699547850a(13) =22094122050a(14) =287223586650
External references
- oeis: A118455