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A053823
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Product of primes in n-th shell of prime spiral.
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1
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2, 111546435, 10334565887047481278774629361, 36134787795296163821030157447828794735407577182650673, 83897624105100872650777504146410004512537400341032979607327005665751086721210969
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OFFSET
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0,1
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COMMENTS
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Write primes in a spiral: the first shell contains a single prime, 2. The next shell contains 8 primes, etc.
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LINKS
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EXAMPLE
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a(2)=3*5*7*11*13*17*19*23=111546435, the product of the 2nd through 9th primes.
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CROSSREFS
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KEYWORD
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easy,nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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