A025505 Index of n-th 2 in A006928.
2, 5, 7, 8, 10, 11, 14, 17, 18, 20, 23, 25, 26, 29, 32, 34, 35, 37, 38, 41, 43, 44, 46, 49, 52, 53, 55, 56, 59, 61, 62, 64, 65, 68, 71, 73, 74, 76, 79, 80, 82, 83, 86, 88, 89, 91, 92, 95, 98, 99, 101, 104, 106, 107, 109, 110, 113, 116, 118, 119, 122, 125, 126, 128, 131, 134, 135
Offset: 1