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A104226
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Product of the smallest and largest n-digit primes.
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0
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14, 1067, 100697, 10062757, 1000609937, 100001299949, 10000020999973, 1000001789999791, 100000000699999559, 10000000036999999769, 1000000001669999999563, 100000000001899999999967
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OFFSET
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1,1
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LINKS
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Table of n, a(n) for n=1..12.
Chris Caldwell, The First 10,000 Primes.
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EXAMPLE
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The first term is 14 since it is the product of 2 and 7, which are the smallest and largest 1-digit primes.
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MATHEMATICA
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NextPrim[n_] := Block[{k = n + 1}, While[ !PrimeQ[k], k++ ]; k]; PrevPrim[n_] := Block[{k = n - 1}, While[ !PrimeQ[k], k-- ]; k]; f[n_] := NextPrim[10^(n - 1)]*PrevPrim[10^n]; Array[f, 13] (* Robert G. Wilson v, Feb 10 2006 *)
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CROSSREFS
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Sequence in context: A227205 A297766 A160011 * A282272 A208395 A132504
Adjacent sequences: A104223 A104224 A104225 * A104227 A104228 A104229
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KEYWORD
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nonn,base
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AUTHOR
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Parthasarathy Nambi, Apr 01 2005
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EXTENSIONS
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More terms from Robert G. Wilson v, Feb 10 2006
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STATUS
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approved
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