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A013581
Let P = 2*3*5*..*p_n = n-th primorial number (
A002110
), G = Z_2xZ_3x...xZ_{p_n}; a(n) = max{e in G} min{i : both e+i, e-i are relatively prime to P}.
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Maintained by
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Last modified November 30 13:13 EST 2009. Contains 167758 sequences.
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