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Search: id:A123134
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| A123134 |
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Prime(n) * ( prime(n+1) + 1 ). |
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+0
1
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| 8, 18, 40, 84, 154, 234, 340, 456, 690, 928, 1178, 1554, 1804, 2064, 2538, 3180, 3658, 4148, 4824, 5254, 5840, 6636, 7470, 8722, 9894, 10504, 11124, 11770, 12426, 14464, 16764, 18078, 19180, 20850, 22648, 23858, 25748, 27384, 29058, 31140, 32578
(list; graph; listen)
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OFFSET
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1,1
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LINKS
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A. Frank & P. Jacqueroux, International Contest, 2001. Item 21
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EXAMPLE
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a(1)=2*(3+1)=8, a(2)=3*(5+1)=18, a(3)=5*(7+1)=40,...
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PROGRAM
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(PARI) for(n=1, 100, print1(prime(n)*(prime(n+1)+1), ", "))
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CROSSREFS
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Sequence in context: A082227 A134062 A067563 this_sequence A096283 A082194 A034714
Adjacent sequences: A123131 A123132 A123133 this_sequence A123135 A123136 A123137
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KEYWORD
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nonn
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AUTHOR
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Herman Jamke (hermanjamke(AT)fastmail.fm), Sep 30 2006
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