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A049282 Primes p such that both p-2 and p+2 are square-free. +0
1
3, 5, 13, 17, 19, 31, 37, 41, 53, 59, 67, 71, 89, 103, 107, 109, 113, 131, 139, 157, 163, 179, 181, 193, 197, 199, 211, 229, 233, 239, 251, 257, 269, 271, 283, 293, 307, 311, 337, 347, 379, 383, 397, 401, 409, 419, 431, 433, 449, 463, 467, 487, 491, 499, 503 (list; graph; listen)
OFFSET

1,1

FORMULA

Intersection[ A049231 and A049233 ]

EXAMPLE

37 is here because neither 37+2 nor 37-2 is divisible by squares.

CROSSREFS

A049231, A049233.

Sequence in context: A018329 A090545 A045411 this_sequence A003625 A105900 A094745

Adjacent sequences: A049279 A049280 A049281 this_sequence A049283 A049284 A049285

KEYWORD

nonn

AUTHOR

Labos E. (labos(AT)ana.sote.hu)

page 1

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Last modified July 8 18:40 EDT 2008. Contains 141013 sequences.


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