A026406 a(n) = n-th number k such that s(k) is odd, where s = A026400.

1, 3, 6, 7, 9, 11, 12, 16, 18, 19, 22, 24, 25, 27, 28, 30, 33, 34, 36, 39, 43, 44, 45, 46, 48, 50, 52, 53, 56, 57, 60, 61, 64, 68, 69, 70, 73, 75, 76, 79, 80, 82