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A133786
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Numbers prime to 10, 10's digit is odd and 100's digit is odd.
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1
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111, 113, 117, 119, 131, 133, 137, 139, 151, 153, 157, 159, 171, 173, 177, 179, 191, 193, 197, 199, 311, 313, 317, 319, 331, 333, 337, 339, 351, 353, 357, 359, 371, 373, 377, 379, 391, 393, 397, 399, 511, 513, 517, 519, 531, 533, 537, 539, 551, 553, 557
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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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LINKS
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FORMULA
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MAPLE
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seq(seq(seq(seq(10^3*a+10^2*b+10*c+d, d=[1, 3, 7, 9]), c=1..9, 2), b=1..9, 2), a=0..1); # Robert Israel, May 20 2019
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CROSSREFS
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KEYWORD
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easy,nonn,base
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AUTHOR
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STATUS
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approved
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