A026515 a(n) = length of n-th run of identical symbols in A026513.

1, 1, 3, 3, 1, 1, 7, 1, 3, 3, 1, 7, 1, 1, 3, 3, 1, 1, 7, 1, 6, 1, 8, 1, 3, 3, 1, 1, 7, 1, 3, 3, 1, 7, 1, 1, 3, 3, 1, 8, 1, 6, 1, 7, 1, 1, 3, 3, 1, 1, 7, 1, 3, 3, 1, 7, 1, 1, 3, 3, 1, 1, 1, 2, 1, 2, 3, 2, 1, 2, 1, 2, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1