A039733 a(n)=k such that p(k) is the prime q<p(n) for which (p(n) mod q) is maximal.

1, 2, 3, 4, 4, 5, 5, 6, 7, 7, 8, 9, 9, 10, 10, 11, 11, 12, 12, 12, 13, 14, 15, 16, 16, 16, 17, 17, 17, 19, 19, 20, 20, 22, 22, 22, 23, 24, 24, 25, 25, 25, 25, 26, 26, 28, 30, 31, 31, 31, 31, 31, 31, 32, 33, 33, 33, 34, 35, 35, 35, 37, 37, 37