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Search: id:A130506
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| A130506 |
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a(1)=1; a(n) = prod(n^2 - p(n-1) + r, r=0..2^(n-2)-1) if n > 1, where p(i) is the i-th prime. |
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+0
1
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| 1, 2, 42, 24024, 43609104000, 1315041316842168115200000
(list; graph; listen)
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OFFSET
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1,2
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COMMENT
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The first four terms agree with a Riemann Hypothesis related sequence.
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REFERENCES
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Marcus du Sautoy, "The Music of the Primes", Harper Collins, 2003.
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EXAMPLE
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a(4) = 24024 because 24024 = (16 - 5 + 0)*(16 - 5 + 1)*(16 - 5 + 2)*(16 - 5 + 3).
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CROSSREFS
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Cf. A039622.
Sequence in context: A124103 A152286 A039622 this_sequence A052078 A069544 A085460
Adjacent sequences: A130503 A130504 A130505 this_sequence A130507 A130508 A130509
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KEYWORD
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easy,nonn
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AUTHOR
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Ben de la Rosa & Johan Meyer (meyerjh.sci(AT)ufs.ac.za), Aug 08 2007
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