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A125111
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Cubes which do not have a partition as the sum of 2 squares.
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2
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27, 216, 343, 1331, 1728, 2744, 3375, 6859, 9261, 10648, 12167, 13824, 19683, 21952, 27000, 29791, 35937, 42875, 54872, 59319, 74088, 79507, 85184, 97336, 103823, 110592, 132651, 157464, 166375, 175616, 185193, 205379, 216000, 238328, 250047
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OFFSET
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1,1
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LINKS
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FORMULA
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MATHEMATICA
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Select[Range[0, 65]^3, SquaresR[2, # ] == 0 &] (* Ray Chandler, Nov 23 2006 *)
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PROG
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(PARI) isA125111(ncube)={ local(a) ; a=0; while(a^2<=ncube, if(issquare(ncube-a^2), return(0) ; ) ; a++ ; ) ; return(1) ; } { for(n=0, 200, if(isA125111(n^3), print1(n^3, ", ") ; ) ; ) ; } - R. J. Mathar, Nov 23 2006
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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