a(n) = max{prime(n) mod q, where prime q < prime(n) = n-th prime}.

Terms

a(0) =1a(1) =2a(2) =2a(3) =4a(4) =6a(5) =6a(6) =8a(7) =10a(8) =12a(9) =14a(10) =18a(11) =18a(12) =20a(13) =18a(14) =24a(15) =28a(16) =30a(17) =30a(18) =34a(19) =36a(20) =38a(21) =40a(22) =42a(23) =44a(24) =48a(25) =50a(26) =48a(27) =50a(28) =54a(29) =60