a(n) is the smallest start of a run of n or more integers having a prime factor greater than n.

Terms

a(0) =2a(1) =5a(2) =13a(3) =19a(4) =55a(5) =65a(6) =113a(7) =151a(8) =151a(9) =226a(10) =364a(11) =406a(12) =736a(13) =736a(14) =1057a(15) =1057a(16) =1409a(17) =1409a(18) =2059a(19) =2059a(20) =2313a(21) =2313a(22) =2313a(23) =2313a(24) =2313a(25) =2313a(26) =2313a(27) =6007a(28) =6961a(29) =6961