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Search: id:A089169
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| A089169 |
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Solutions x for x^2-1 = kp where p is prime and k=1,2... |
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+0
1
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| 2, 4, 3, 4, 6, 6, 5, 8, 10, 12, 5, 12, 14, 16, 7, 9, 18, 18, 8, 20, 22, 7, 11, 13, 24, 28, 30, 30, 15, 10, 32, 36, 14, 38, 40, 9, 11, 21, 42, 42, 44, 46, 23, 25, 48, 16, 52, 54, 13, 27, 20, 58, 60, 11, 60, 62, 33, 14, 66, 22, 68, 70, 72, 19, 35, 37, 72, 74, 78, 39, 80, 82, 13, 16, 84
(list; graph; listen)
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OFFSET
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1,1
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PROGRAM
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(PARI) xpm1(n, m, pow) = { for(k=1, m, for(x=1, n, y= x^pow - 1; z=floor(y/k); if(floor(y/k)*k==y, if(isprime(z), print1(x", ") ) ) ) )
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CROSSREFS
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Sequence in context: A098604 A083172 A104148 this_sequence A087794 A050514 A133702
Adjacent sequences: A089166 A089167 A089168 this_sequence A089170 A089171 A089172
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KEYWORD
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easy,nonn
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AUTHOR
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Cino Hilliard (hillcino368(AT)gmail.com), Dec 07 2003
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