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A166457
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Numbers n such that n*100+1 is prime.
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1
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1, 4, 6, 7, 12, 13, 16, 18, 19, 28, 30, 33, 37, 40, 42, 48, 51, 55, 57, 58, 61, 63, 67, 70, 79, 81, 85, 90, 96, 99, 103, 105, 106, 117, 118, 121, 123, 124, 126, 130, 139, 144, 151, 154, 156, 159, 160, 163, 169, 174, 183, 184, 187, 190, 193, 195, 198, 201, 202, 210, 211
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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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a(1)=1 (1*100+1=prime); a(2)=4 (4*100+1=prime).
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MAPLE
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a := proc (n) if isprime(100*n+1) then n else end if end proc: seq(a(n), n = 1 .. 250); # Emeric Deutsch, Nov 01 2009
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MATHEMATICA
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Select[If[PrimeQ[100*# + 1], #] & /@ Range[2*8!], IntegerQ] (* G. C. Greubel, May 15 2016 *)
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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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