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A087573
Smallest number k such that prime(4) + k, prime(5) + k, ..., prime(n+3) + k are all prime.
0
4, 6, 6, 6, 90, 90
OFFSET
1,1
EXAMPLE
a(3)=a(4)=6 as 7+6=13, 11+6=17, 13+6=19 and 17+6=23 are all prime.
CROSSREFS
Cf. A087551.
Sequence in context: A298562 A298755 A035551 * A201235 A205847 A227967
KEYWORD
nonn,fini,full
AUTHOR
Amarnath Murthy, Sep 17 2003
EXTENSIONS
Edited by Don Reble, Sep 23 2003
STATUS
approved