A268331 Squarefree numbers differing by more than 2 from any other squarefree number.

26, 170, 362, 530, 638, 727, 874, 926, 962, 1027, 1126, 1423, 1574, 1774, 1814, 1826, 1861, 2059, 2402, 2526, 2674, 2726, 2782, 2874, 3178, 3482, 3574, 3719, 3774, 3970, 4166, 4474, 4490, 4526, 4654, 5042, 5045, 5374, 5426, 5914, 5930, 6026, 6173, 6254, 6274, 6326, 6418, 6626, 6649, 6726, 7138, 7174

Offset

1,1

Links

Christopher E. Thompson, Table of n, a(n) for n = 1..1000

Example

26 is a term because 26 is squarefree but 24,25,27,28 are not.

Mathematica

SequencePosition[Table[If[SquareFreeQ[n], 1, 0], {n, 7200}], {0, 0, 1, 0, 0}][[All, 1]]+2 (* Requires Mathematica version 10 or later *) (* Harvey P. Dale, Jun 19 2018 *)

Crossrefs

Cf. A073247, A268332, A268333, A268334.

Sequence in context: A283567 A037052 A156339 * A125336 A321113 A126494

Adjacent sequences: A268328 A268329 A268330 * A268332 A268333 A268334

Keyword

nonn

Author

Christopher E. Thompson, Feb 01 2016

Status

approved