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Search: id:A107818
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| A107818 |
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Slowest increasing sequence where (product of 2 consecutive integers)-1 is prime. |
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+0
1
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| 2, 3, 4, 5, 6, 7, 12, 14, 16, 17, 22
(list; graph; listen)
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OFFSET
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0,1
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COMMENT
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Essentially the same as A070916. [From R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Aug 24 2008]
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EXAMPLE
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(2*3)-1=5, which is prime; (3*4)-1=11=prime; (4*5)-1=19=prime; (5*6)-1=29=prime, etc.
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CROSSREFS
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Sequence in context: A032903 A028819 A108948 this_sequence A039952 A129978 A033079
Adjacent sequences: A107815 A107816 A107817 this_sequence A107819 A107820 A107821
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KEYWORD
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base,easy,nonn
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AUTHOR
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Eric Angelini (eric.angelini(AT)kntv.be), Jun 11 2005
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