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A153400
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Numbers n such that 18*n+1 is not prime.
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3
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0, 3, 5, 8, 12, 13, 14, 16, 18, 19, 20, 23, 25, 26, 28, 31, 33, 36, 37, 38, 39, 40, 43, 44, 47, 48, 50, 53, 54, 57, 58, 60, 61, 63, 66, 67, 68, 69, 70, 73, 74, 75, 76, 77, 78, 80, 82, 83, 84, 88, 89, 91, 93, 95, 96, 98
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OFFSET
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1,2
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LINKS
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EXAMPLE
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Distribution of the positive terms in the following triangular array:
*;
*,*;
*,*,*;
*,*,*,*;
*,3,*,*,*;
*,*,5,*,*,*;
*,*,*,*,*,*,*;
*,*,*,*,*,*,*,16;
*,*,*,*,*,*,*,*,20;
*,*,*,*,*,*,*,*,*,*;
*,*,*,*,14,*,*,*,*,*,*; etc.
where * marks the noninteger values of (2*h*k + k + h)/9 with h >= k >= 1. - Vincenzo Librandi, Jan 14 2013
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MATHEMATICA
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PROG
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CROSSREFS
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KEYWORD
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nonn,easy
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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