A050418 a(n) = n-th number k such that b(k)<b(k+1), where b=A050416.

2, 3, 4, 5, 6, 8, 9, 11, 13, 15, 17, 18, 20, 22, 24, 26, 28, 30, 33, 36, 38, 40, 42, 45, 48, 49, 50, 51, 54, 57, 58, 59, 61, 63, 66, 67, 69, 71, 72, 73, 75, 77, 81, 82, 83, 85, 86, 88, 91, 93, 95, 96, 97, 99, 100, 103, 104, 106, 108, 110