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A091301 Primes of the form p*q + p - q, where p and q are distinct primes. 3
5, 7, 13, 17, 19, 29, 31, 37, 41, 43, 61, 67, 73, 89, 97, 103, 109, 113, 127, 137, 139, 149, 151, 157, 181, 193, 197, 199, 211, 229, 233, 241, 257, 271, 277, 281, 283, 307, 313, 317, 337, 349, 353, 373, 379, 389, 397, 401, 409, 421, 433, 449, 457, 461, 463, 487 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Charles R Greathouse IV, Table of n, a(n) for n = 1..10000

MATHEMATICA

nn=100; Take[Select[Union[Flatten[{First[#]*Last[#]+First[#]-Last[#], First[#]*Last[#]- First[#]+Last[#]}&/@Subsets[Prime[Range[nn]], {2}]]], PrimeQ], nn] (* Harvey P. Dale, Jul 12 2014 *)

PROG

(PARI) list(lim)=my(v=List(), t); forprime(q=2, lim, forprime(p=2, (lim+q)\(q+1), if(ispseudoprime(t=p*q+p-q), listput(v, t)))); vecsort(Vec(v), , 8) \\ Charles R Greathouse IV, Feb 15 2011

CROSSREFS

Primes of the form p*q+p+q, where p and q are primes, are in A066938.

Cf. A091310.

Sequence in context: A136089 A337811 A040995 * A040125 A106067 A287614

Adjacent sequences:  A091298 A091299 A091300 * A091302 A091303 A091304

KEYWORD

easy,nonn

AUTHOR

Zak Seidov, Feb 21 2004

EXTENSIONS

Definition clarified by Harvey P. Dale, Jul 12 2014

STATUS

approved

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Last modified January 25 11:23 EST 2022. Contains 350567 sequences. (Running on oeis4.)