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A094230
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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).
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1
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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
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OFFSET
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1,1
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LINKS
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EXAMPLE
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a(3)=1489 because 1489 and 1493 are cousin primes, while 1490-1492 each have 3 prime divisors (counting multiplicity).
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MATHEMATICA
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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 *)
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CROSSREFS
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KEYWORD
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easy,nonn
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AUTHOR
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STATUS
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approved
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