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Search: id:A145292
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| A145292 |
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Composite numbers generated by the Euler polynomial x^2 + x + 41. |
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+0
6
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| 1681, 1763, 2021, 2491, 3233, 4331, 5893, 6683, 6847, 7181, 7697, 8051, 8413, 9353, 10547, 10961, 12031, 13847, 14803, 15047, 15293, 16043, 16297, 17071, 18673, 19223, 19781, 20633, 21797, 24221, 25481, 26123, 26447, 26773, 27101, 29111
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OFFSET
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1,1
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COMMENT
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Euler polynomial is giving primes for consecutive x from 0 to 39. Numbers x for which x^2 + x + 41 is not prime see A007634.
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MATHEMATICA
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a = {}; Do[If[PrimeQ[x^2 + x + 41], null, AppendTo[a, x^2 + x + 41]], {x, 0, 500}]; a
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CROSSREFS
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A005846, A007634, A145293, A145294, A145295
Sequence in context: A093787 A060095 A156422 this_sequence A163009 A069331 A156175
Adjacent sequences: A145289 A145290 A145291 this_sequence A145293 A145294 A145295
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KEYWORD
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nonn
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AUTHOR
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Artur Jasinski (grafix(AT)csl.pl), Oct 06 2008
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