cp's OEIS Frontend

A333522 Lexicographically earliest sequence of distinct positive integers such that for any nonempty set of k positive integers, say {m_1, ..., m_k}, a(m_1) XOR ... XOR a(m_k) is neither null nor prime (where XOR denotes the bitwise XOR operator).

Original entry on oeis.org

			For n = 1:
- we can choose a(1) = 1.
For n = 2:
- 2 is prime,
- 3 is prime,
- 4 XOR 1 = 5 is prime,
- 5 is prime,
- 6 XOR 1 = 7 is prime,
- 7 is prime,
- neither 8 nor 8 XOR 1 = 9 is prime,
- so a(2) = 8.