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A108705
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Numbers n such that a^n + b^n + c^n + ... is a square, where a*b*c* ... is the prime factorization of n.
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OFFSET
| 1,2
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COMMENTS
| No more terms through 630000. - Ryan Propper (rpropper(AT)stanford.edu), May 12 2006
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EXAMPLE
| 16 is in the sequence because 16 = 2^4 and 2^16 + 2^16 + 2^16 + 2^16 = 262144
= 512^2.
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CROSSREFS
| Cf. A082872.
Sequence in context: A190046 A067566 A067555 * A113933 A127871 A109210
Adjacent sequences: A108702 A108703 A108704 * A108706 A108707 A108708
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KEYWORD
| hard,nonn
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AUTHOR
| Jason Earls (zevi_35711(AT)yahoo.com), Jun 20 2005
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EXTENSIONS
| Two more terms from Ryan Propper (rpropper(AT)stanford.edu), May 12 2006
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