A153215 Primes p such that none of p-2, p-1, p+1, and p+2 is squarefree.

727, 1423, 1861, 3719, 6173, 9749, 11321, 13183, 19073, 20873, 23227, 23473, 23827, 26981, 27883, 34351, 35323, 41263, 42677, 44449, 45127, 45523, 47527, 48751, 49727, 52391, 53623, 53849, 68749, 71993, 72559, 78823, 83609, 89227, 92779

Offset

1,1

Links

Amiram Eldar, Table of n, a(n) for n = 1..10000

Mathematica

<< NumberTheory`NumberTheoryFunctions` lst={}; Do[p=Prime[n]; If[ !SquareFreeQ[p-1]&&!SquareFreeQ[p+1]&&!SquareFreeQ[p-2]&&!SquareFreeQ[p+2], AppendTo[lst, p]], {n, 4*7!}]; lst

Crossrefs

Cf. A049282, A049097, A039787, A075432, A153207, A153208, A153209, A153210, A153213, A153214.

Sequence in context: A108846 A052234 A103170 * A129117 A158394 A038600

Adjacent sequences: A153212 A153213 A153214 * A153216 A153217 A153218

Keyword

nonn

Author

Vladimir Joseph Stephan Orlovsky, Dec 20 2008

Status

approved