A268332 Squarefree numbers differing by more than 3 from any other squarefree number.

2526, 44405, 47527, 47973, 55779, 72474, 101037, 106327, 106674, 109023, 110107, 133577, 153173, 165574, 183553, 186247, 193026, 196747, 208847, 209674, 212127, 218527, 220209, 234622, 237522, 245149, 261478, 266853, 269953, 308649, 328877, 334522, 342066, 364151, 370785, 375823

Offset

1,1

Links

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

Maple

SF:= select(numtheory:-issqrfree, [$1..10^6]):
SF[select(i -> SF[i]-SF[i-1]>=4  and SF[i+1]-SF[i]>=4, [$2..nops(SF)-1])]; # Robert Israel, Feb 02 2016

Crossrefs

Cf. A005117, A073247, A268331, A268333, A268334.

Sequence in context: A251918 A111729 A252288 * A369521 A203440 A231968

Adjacent sequences: A268329 A268330 A268331 * A268333 A268334 A268335

Keyword

nonn

Author

Christopher E. Thompson, Feb 01 2016

Status

approved