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A024899
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Nonnegative integers n such that 6n+1 is prime.
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22
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1, 2, 3, 5, 6, 7, 10, 11, 12, 13, 16, 17, 18, 21, 23, 25, 26, 27, 30, 32, 33, 35, 37, 38, 40, 45, 46, 47, 51, 52, 55, 56, 58, 61, 62, 63, 66, 68, 70, 72, 73, 76, 77, 81, 83, 87, 90, 91, 95, 96, 100, 101, 102, 103, 105, 107, 110, 112, 115, 118, 121, 122, 123, 125, 126, 128, 131, 135, 137
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,2
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LINKS
| T. D. Noe, Table of n, a(n) for n=1..1000
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FORMULA
| a(n) = A024892(n)/2 = (A034936(n)+1)/2. - Ray Chandler (rayjchandler(AT)sbcglobal.net), Dec 26 2003
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MAPLE
| a := [ ]: for n from 0 to 400 do if isprime(6*n+1) then a := [ op(a), n ]; fi; od: A002476 := n->a[n];
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MATHEMATICA
| a={}; Do[x=6*n+1; If[PrimeQ[x], AppendTo[a, n]], {n, 10^2}]; a - Vladimir Orlovsky (4vladimir(AT)gmail.com), Apr 29 2008
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PROG
| (MAGMA) [n: n in [0..200]| IsPrime(6*n+1)] [From Vincenzo Librandi, Nov 20 2010]
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CROSSREFS
| A002476 gives primes, A091178 gives prime index.
Complement of A046954 relative to A000027.
Sequence in context: A061854 A110086 A107746 * A114518 A066940 A100118
Adjacent sequences: A024896 A024897 A024898 * A024900 A024901 A024902
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KEYWORD
| nonn,easy
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AUTHOR
| Clark Kimberling (ck6(AT)evansville.edu)
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