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A153351
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Numbers n such that 7*n+2 is not prime.
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2
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1, 2, 4, 6, 7, 8, 9, 10, 12, 13, 14, 16, 17, 18, 19, 20, 22, 24, 25, 26, 28, 29, 30, 31, 32, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 46, 48, 49, 50, 52, 54, 55, 56, 58, 59, 60, 61, 62, 64, 66, 67, 68, 69, 70, 72, 73, 74, 75, 76, 78, 79, 80, 82, 83, 84, 85, 86, 87, 88, 89, 90
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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 odd terms in the following triangular array:
1;
*,*;
*,*,*;
*,*,*,*;
*,*,*,*,17;
*,9,*,*,*,*;
*,*,*,19,*,*,*;
7,*,*,*,*,*,*,41;
*,*,*,*,*,35,*,*,*;
*,*,*,*,*,*,*,*,*,*;
*,*,*,*,*,*,49,*,*,*,*;
*,*,*,*,39,*,*,*,*,*,*,89;
*,19,*,*,*,*,*,*,73,*,*,*,*; etc.
where * marks the non-integer values of (4*h*k + 2*k + 2*h - 1)/7 with h >= k >= 1. - Vincenzo Librandi, Jan 17 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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