A359947 a(n) = n XOR A359946(n) (where XOR denotes the bitwise XOR operator).

3, 3, 7, 7, 3, 3, 13, 3, 5, 13, 3, 5, 3, 3, 31, 31, 3, 3, 7, 7, 3, 3, 13, 3, 5, 13, 3, 5, 3, 3, 61, 3, 5, 61, 3, 5, 3, 3, 13, 3, 5, 13, 3, 5, 3, 3, 31, 31, 3, 3, 7, 7, 3, 3, 13, 3, 5, 13, 3, 5, 3, 3, 127, 127, 3, 3, 7, 7, 3, 3, 13, 3, 5, 13, 3, 5, 3, 3, 31, 31

Offset

1,1

Comments

All terms are prime.

Links

Rémy Sigrist, Table of n, a(n) for n = 1..10000

Example

a(42) = 42 XOR A359946(42) = 42 XOR 39 = 13.

Prog

(PARI) { s = 0; for (n = 1, 80, for (v = 1, oo, if (!bittest(s, v) && isprime(p = bitxor(n, v)), print1 (p", "); s += 2^v; break))) }

Crossrefs

Cf. A359946.

Sequence in context: A000199 A243099 A324877 * A201932 A161771 A160515

Adjacent sequences: A359944 A359945 A359946 * A359948 A359949 A359950

Keyword

nonn,base

Author

Rémy Sigrist, Jan 19 2023

Status

approved