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Search: id:A153129
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| A153129 |
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Numbers n such that 8*n + 5 is not prime |
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+0
1
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| 2, 5, 8, 9, 10, 11, 14, 15, 16, 17, 20, 23, 25, 26, 27, 29, 30, 31, 32, 35, 37, 38, 40, 41, 42, 44, 45, 47, 50, 51, 53, 54, 55, 56, 58, 59, 60, 61, 62, 64, 65, 66, 68, 70, 71, 72, 73, 74, 75, 77, 78, 79, 80
(list; graph; listen)
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OFFSET
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1,1
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FORMULA
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Let p = prime number n = [(p^2+4p-5)/8] mod (p)
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EXAMPLE
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*; *, *; 2, *, *; *, 5, *, *; *, *, 9, *, *; *, *, *, 14, *, *; 5, *, *, *, 20, *, *; *, 10, *, *, *, 27, *, *; *, *, 16, *, *, *, 35, *, *;
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CROSSREFS
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Cf. A105133
Sequence in context: A071099 A078001 A072955 this_sequence A076871 A070049 A085254
Adjacent sequences: A153126 A153127 A153128 this_sequence A153130 A153131 A153132
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KEYWORD
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nonn
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AUTHOR
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Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Dec 19 2008
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