a(n) = binomial(prime(n+3), prime(n)).

Terms

a(0) =21a(1) =165a(2) =1287a(3) =19448a(4) =75582a(5) =1144066a(6) =51895935a(7) =141120525a(8) =6107086800a(9) =7898654920a(10) =15338678264a(11) =5178066751a(12) =266783135710