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Search: id:A165691
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| A165691 |
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Primes p such that pi(p) is the product of the first digit of p and the rest number. |
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+0
1
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OFFSET
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1,1
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COMMENT
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A subsequence of A112013. There is no further term up to 3*10^10.
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EXAMPLE
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619=prime(6*19), so 619 is in the sequence.
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MATHEMATICA
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Do[If[h=IntegerDigits[Prime[m]]; m==h[[1]]*FromDigits[Delete[h, 1]],
Print[Prime[m]}]], {m, 355000}]
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CROSSREFS
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Cf. A000040, A112013.
Sequence in context: A146658 A145440 A112013 this_sequence A154419 A097223 A063494
Adjacent sequences: A165688 A165689 A165690 this_sequence A165692 A165693 A165694
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KEYWORD
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hard,more,nonn
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AUTHOR
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F. Firoozbakht (mymontain(AT)yahoo.com), Oct 14 2009
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