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A047978
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Let (p1,p2), (p3,p4) be pairs of twin primes with p1*p2=p3+p4-1; sequence gives values of p3.
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1
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17, 71, 881, 2591, 179999, 206081, 388961, 2268449, 2836961, 3612671, 6329681, 6415361, 10342151, 18800711, 28486151, 32080049, 40878881, 89753201, 97050311, 127552391, 154844801, 183169799, 230953031, 344531249
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