**a(n) = the smallest prime p(k) such that p(k+j) - p(k+j-1) = p(n+k+1-j) - p(n+k-j) for all j with 1 <= j <= n.**

*2, 3, 5, 18713, 5, 683747, 17, 98303867, 13, 60335249851, 137, 116976974911*

*3 seqfan posts*

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

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