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A094230
Lesser member p of cousin primes (p, p+4) such that (p+1, p+2, p+3) all have the same number of prime divisors (counted with multiplicity).
1
1429, 1447, 1489, 2083, 2617, 2953, 3529, 4153, 5689, 8443, 10267, 10627, 12409, 13147, 15667, 15787, 20743, 22027, 22153, 24763, 24967, 26107, 27733, 28513, 33613, 34843, 35569, 37963, 39313, 43987, 44203, 46807, 47977, 51577, 54163
OFFSET
1,1
LINKS
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
Cf. A023200.
Sequence in context: A156853 A292704 A321036 * A353080 A238136 A060364
KEYWORD
easy,nonn
AUTHOR
Jason Earls, May 29 2004
STATUS
approved