OFFSET

1,1

LINKS

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

EXAMPLE

a(3)=1489 because 1489 and 1493 are cousin primes, while 1490-1492 each have 3 prime divisors (counting multiplicity).

MATHEMATICA

cppdQ[n_]:=PrimeQ[n+4]&&Length[Union[PrimeOmega[Range[n+1, n+3]]]]==1; Select[ Prime[ Range[6000]], cppdQ] (* Harvey P. Dale, Mar 31 2019 *)

CROSSREFS

KEYWORD

easy,nonn

AUTHOR

Jason Earls, May 29 2004

STATUS

approved