1,1

Eight consecutive odd numbers starting with p are squarefree.

This is the longest set as p+16 in all cases are divisible by 9.

All terms are congruent to 11 mod 18.

Zak Seidov, Table of n, a(n) for n = 1..1592

(MAGMA) [p: p in PrimesUpTo(4500) | forall{k: k in [1..7] | IsSquarefree(p+2*k)}]; // Vincenzo Librandi, Feb 09 2016

Cf. A049097, A049233.

Sequence in context: A141930 A153680 A097722 * A156784 A142592 A255187

Adjacent sequences: A268609 A268610 A268611 * A268613 A268614 A268615

nonn

Zak Seidov, Feb 08 2016

approved