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A047979 Let (p1,p2), (p3,p4) be pairs of twin primes with p1*p2=p3+p4-1; sequence gives values of p4. 3
19, 73, 883, 2593, 180001, 206083, 388963, 2268451, 2836963, 3612673, 6329683, 6415363, 10342153, 18800713, 28486153, 32080051, 40878883, 89753203, 97050313, 127552393, 154844803, 183169801, 230953033 (list; graph; refs; listen; history; internal format)
OFFSET

0,1

EXAMPLE

E.g. 5*7=17+19-1,11*13=71+73-1.

CROSSREFS

Cf. A047976-A047978.

Sequence in context: A178541 A157889 A118593 * A159997 A073566 A041698

Adjacent sequences:  A047976 A047977 A047978 * A047980 A047981 A047982

KEYWORD

nonn

AUTHOR

Naohiro Nomoto (6284968128(AT)geocities.co.jp)

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Last modified February 16 20:10 EST 2012. Contains 205960 sequences.