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A247104
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Squarefree self-numbers.
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3
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3, 5, 7, 31, 42, 53, 86, 97, 110, 143, 154, 165, 187, 209, 211, 222, 233, 255, 266, 277, 299, 310, 323, 334, 345, 367, 389, 411, 413, 435, 446, 457, 479, 501, 514, 547, 569, 591, 602, 613, 615, 626, 659, 670, 681, 703, 714, 727, 749, 771, 782, 793, 815, 817
(list;
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refs;
listen;
history;
text;
internal format)
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OFFSET
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1,1
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COMMENTS
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Squarefree numbers not expressible as the sum of an integer and its digit sum;
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LINKS
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FORMULA
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MATHEMATICA
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nmax = 1000;
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PROG
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(Haskell)
a247104 n = a247104_list !! (n-1)
a247104_list = filter ((== 1) . a008966) $ tail a003052_list
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CROSSREFS
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KEYWORD
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nonn,base
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AUTHOR
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STATUS
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approved
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