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A082982
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Numbers k such that k, k+1 and k+2 are sums of 2 squares.
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5
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0, 8, 16, 72, 80, 144, 232, 288, 360, 520, 576, 584, 800, 808, 1088, 1096, 1152, 1224, 1312, 1600, 1664, 1744, 1800, 1872, 1960, 2248, 2304, 2312, 2384, 2592, 2600, 2824, 3328, 3392, 3528, 3600, 4112, 4176, 4328, 4624, 5120, 5184, 5328, 5408, 5904, 6056
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OFFSET
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1,2
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COMMENTS
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LINKS
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FORMULA
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EXAMPLE
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80 is here because 80=4^2+8^2, 81=0^2+9^2 and 82=1^2+9^2.
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PROG
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(PARI) issumsq(n) = {ok = 0; for (i=0, ceil(sqrt(n/2)), if (issquare(n - i^2), return (1)); ); return (0); }
isok(n) = issumsq(n) && issumsq(n+1) && issumsq(n+2) \\ Michel Marcus, Jun 30 2013
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CROSSREFS
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KEYWORD
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easy,nonn
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AUTHOR
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Xavier Xarles (xarles(AT)mat.uab.es), May 28 2003
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EXTENSIONS
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STATUS
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approved
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