**a(n) = the least positive d such that for p=prime(n), the numbers p+0d, p+1d, p+2d, ..., p+(p-1)d are all primes. See A113834 for last term in the progression.**

*1, 2, 6, 150, 1536160080, 9918821194590, 34197620478999233256*

*1 seqfan posts*

Index of A-numbers in seqfan: by ascending order by month by frequency by keyword

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