a(n) = smallest prime of the form n*(n+1)*(n+2)...(n+k-1) - 1, or zero if no such a prime exists.

Terms

a(0) =5a(1) =5a(2) =2a(3) =3a(4) =29a(5) =5a(6) =503a(7) =7a(8) =89a(9) =109a(10) =131a(11) =11a(12) =181a(13) =13a(14) =239a(15) =271a(16) =5813a(17) =17a(18) =379a(19) =19a(20) =461a(21) =12143a(22) =13799a(23) =23a(25) =701a(26) =657719a(27) =811a(28) =968330879a(29) =29a(30) =991