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A201734
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Numbers n such that 90*n + 47 is prime.
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19
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0, 1, 2, 3, 6, 7, 9, 10, 13, 14, 16, 18, 20, 22, 24, 25, 27, 29, 31, 32, 38, 39, 43, 44, 49, 50, 51, 53, 56, 63, 64, 65, 66, 69, 77, 80, 83, 84, 87, 90, 91, 95, 98, 101, 102, 105, 106, 107, 108, 109, 111, 116, 118, 120, 121, 122, 123, 129, 132, 134, 135, 137
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internal format)
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OFFSET
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1,3
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COMMENTS
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A reverse reading of A142313; all entries of A142313 have digital root 2 and last digit 7.
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LINKS
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FORMULA
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MAPLE
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for n from 0 to 240 do
p := 90*n+47 ;
if isprime(p) then
printf("%d, ", n) ;
end if;
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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,less
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AUTHOR
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STATUS
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approved
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