a(n) = lcm_{k=0..n} (k! + 1).A137244a(n) = lcm_{k=0..n} (k! + 1).Terms a(0) =2a(1) =2a(2) =6a(3) =42a(4) =1050a(5) =127050a(6) =13086150a(7) =65967282150External referencesoeis: A137244