A026364 a(n) = greatest k such that s(k) = n, where s = A026362.

2, 7, 10, 13, 16, 21, 24, 29, 32, 37, 40, 45, 48, 51, 54, 59, 62, 67, 70, 73, 76, 81, 84, 89, 92, 95, 98, 103, 106, 111, 114, 117, 120, 125, 128, 133, 136, 141, 144, 149, 152, 155, 158, 163, 166, 171, 174, 177, 180, 185, 188, 193, 196