A135725 Let d(i) be the i-th digit of the decimal expansion of e = 2.718281828459045235360287471352662..., so that d(0) = 2, d(1) = 7, d(2) = 1, etc. Then a(0) = 2, a(n) = d(d(n)) for n>0.

2, 8, 7, 2, 1, 2, 7, 2, 1, 2, 2, 8, 8, 2, 2, 8, 1, 8, 8, 8, 1, 2, 1, 2, 8, 2, 8, 7, 8, 8, 1, 1, 1, 1, 2, 8, 8, 8, 8, 8, 1, 2, 8, 2, 8, 8, 1, 8, 8, 8, 8, 8, 8, 8, 2, 8, 1, 1, 8, 1, 8, 1, 1, 8, 8, 1, 2, 2, 8, 1, 1, 8, 2, 8, 8, 8, 8, 2, 8, 8, 8, 2, 8, 8, 7, 8, 2, 1, 7, 8, 2, 8, 1, 8, 7, 1, 1, 2, 1