A227443 - OEIS

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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

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

COMMENTS

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

LINKS

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

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

Cf. A178910, A002961.

Sequence in context: A193810 A217987 A119814 * A050884 A156554 A197325

Adjacent sequences: A227440 A227441 A227442 * A227444 A227445 A227446

KEYWORD

nonn,base

AUTHOR

Alex Ratushnyak, Jul 11 2013

STATUS

approved