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Search: id:A096345
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| A096345 |
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Primes of the form p*q - p - q, where p and q are two successive primes. |
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+0
3
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| 7, 23, 59, 191, 839, 1439, 1931, 5039, 8447, 11447, 23399, 26891, 36479, 41579, 46619, 57119, 59999, 77279, 110879, 163199, 232307, 323759, 370871, 414731, 470579, 521267, 566999, 606791, 664199, 678971, 776159, 824459, 835379, 879839
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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These primes are not the sum of two squares.
The number of terms less than 10^n: 1, 3, 5, 9, 18, 35, 83, 190, 425, 1105, 2962, 7695, 20187, 54280, 147464, 402660, 1116912, ..., . - Robert G. Wilson v, Apr 09 2008
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LINKS
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R. G. Wilson v, Table of n, a(n) for n=1..7700
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EXAMPLE
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a(3)=59 because 7*11 - 7 - 11=59.
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MATHEMATICA
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lst = {}; p = q = 2; Do[p = q; q = NextPrime@q; r = p*q - p - q; If[ PrimeQ@r, AppendTo[lst, r]], {n, 2^31 - 1}]; lst {* from Robert G. Wilson v, Apr 09 2008 *}
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CROSSREFS
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Sequence in context: A037165 A126284 A140096 this_sequence A077037 A104149 A001275
Adjacent sequences: A096342 A096343 A096344 this_sequence A096346 A096347 A096348
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KEYWORD
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nonn
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AUTHOR
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Giovanni Teofilatto (g.teofilatto(AT)tiscalinet.it), Jun 29 2004
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EXTENSIONS
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More terms from Robert G. Wilson v (rgwv(AT)rgwv.com), Jul 01 2004
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