

A271450


a(n) = smallest magic sum of any 3 X 3 magic square which contains exactly n cubes, or 0 if no such magic square exists.


1




OFFSET

0,1


COMMENTS

For n >= 7, a(n) = 0 because the equation x^n + y^n = 2*z^n has no solution for n > 2 apart from the trivial x = y = z.


REFERENCES

Richard K. Guy, Unsolved Problems in Number Theory, New York: SpringerVerlag, 2004, pp. 268271.


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CROSSREFS



KEYWORD

nonn,fini,hard,more


AUTHOR



STATUS

approved



