login
A227443
Numbers k such that k and k+1 have the same binary XOR of divisors.
1
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
1,1
COMMENTS
n such that A178910(n+1) = A178910(n).
LINKS
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 *)
CROSSREFS
Sequence in context: A193810 A217987 A119814 * A050884 A156554 A197325
KEYWORD
nonn,base
AUTHOR
Alex Ratushnyak, Jul 11 2013
STATUS
approved