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A196000
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Numbers k such that 90*k + 19 is prime.
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21
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0, 1, 2, 4, 8, 9, 10, 11, 14, 16, 17, 22, 23, 24, 25, 28, 30, 34, 35, 36, 39, 41, 43, 46, 48, 50, 53, 55, 56, 60, 63, 64, 65, 69, 74, 77, 78, 79, 80, 81, 83, 85, 86, 91, 93, 98, 99, 101, 102, 107, 108, 109, 111, 112, 115, 116
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OFFSET
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1,3
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COMMENTS
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A142322 is a digital root 1 and last digit 9 preserving sequence.
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LINKS
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FORMULA
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MAPLE
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option remember;
if n = 1 then
19 ;
else
a := nextprime(procname(n-1)) ;
while (a mod 45) <> 19 do
a := nextprime(a) ;
end do;
return a;
end if;
end proc:
end proc:
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MATHEMATICA
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Select[Range[0, 120], PrimeQ[90 # + 19] &] (* Ivan Neretin, Apr 27 2017 *)
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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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STATUS
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approved
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