A227443 Numbers k such that k and k+1 have the same binary XOR of divisors.

6, 110, 116, 194, 198, 204, 237, 437, 452, 507, 965, 969, 986, 1011, 1736, 1748, 1808, 1824, 1896, 1971, 1989, 2021, 3696, 6230, 6243, 6533, 6875, 12974, 13736, 13764, 14567, 14790, 15720, 26625, 29516, 29715, 32102, 49251, 55686, 57489, 61329, 64440, 99780, 104247, 114738

Offset: 1

Author

Alex Ratushnyak, Jul 11 2013

Keywords

• nonn
• base

Comments

n such that A178910(n+1) = A178910(n).

Links

• Amiram Eldar, Table of n, a(n) for n = 1..700

Crossrefs

Cf. A178910, A002961.

Programs

Mathematica

b[n_] := BitXor @@ Divisors[n]; b1 = 0; s = {}; Do[b2 = b[n]; If[b1 == b2, AppendTo[s, n-1]]; b1 = b2, {n, 1, 10^4}]; s (* Amiram Eldar, Sep 19 2019 *)