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

Author

Christopher E. Thompson, Feb 01 2016

Keywords

• nonn

Examples

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

Links

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

Crossrefs

Cf. A073247, A268332, A268333, A268334.

Programs

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 *)