A346302 Positions of words in A076478 such that first digit != last digit.
4, 5, 8, 10, 11, 13, 16, 18, 20, 22, 23, 25, 27, 29, 32, 34, 36, 38, 40, 42, 44, 46, 47, 49, 51, 53, 55, 57, 59, 61, 64, 66, 68, 70, 72, 74, 76, 78, 80, 82, 84, 86, 88, 90, 92, 94, 95, 97, 99, 101, 103, 105, 107, 109, 111, 113, 115, 117, 119, 121, 123, 125
Offset: 1
Examples
The first fourteen words w(n) are 0, 1, 00, 01, 10, 11, 000, 001, 010, 011, 100, 101, 110, 111, so that a(1) = 4.
Programs
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Mathematica
(See A007931.)
Comments