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A103547
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a(n) is the smallest n-digit zeroless prime such that the sum of the two numbers that result from splitting a(n) between any two of its digits is a distinct prime.
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0
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11, 281, 2267, 26881, 464447, 6462667, 0, 0, 0, 0, 0
(list; graph; refs; listen; history; internal format)
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OFFSET
| 2,1
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COMMENTS
| Contribution from Sean A. Irvine (sairvin(AT)xtra.co.nz), Apr 11 2010: (Start)
a(n)=0 means there is no number of length n satisfying the definition.
The last digit is always odd and every other digit is even (except for a(1)=11) (End)
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EXAMPLE
| a(4)=2267. 2+267=269, which is prime. 22+67=89, which is prime. 226+7=233, which is prime.
a(2) is NOT 227 because 2+27=29 and 22+7=29 are the same prime. [From Sean A. Irvine (sairvin(AT)xtra.co.nz), Apr 11 2010]
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CROSSREFS
| Sequence in context: A062210 A049080 A129754 * A171195 A196790 A166182
Adjacent sequences: A103544 A103545 A103546 * A103548 A103549 A103550
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KEYWORD
| base,more,nonn
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AUTHOR
| Ray G. Opao (1260(AT)email.com), Mar 23 2005
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EXTENSIONS
| More terms from Sean A. Irvine (sairvin(AT)xtra.co.nz), Apr 11 2010
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