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Search: id:A083820
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A083820 Primes in which odd positioned digits are prime and even positioned digits are composite. The least significant digit is the taken to be the first digit. +0
2
2, 3, 5, 7, 43, 47, 67, 83, 97, 263, 283, 293, 347, 367, 383, 397, 547, 563, 587, 593, 743, 787, 797, 4243, 4283, 4297, 4363, 4397, 4547, 4567, 4583, 4597, 4783, 4787, 4793, 6247, 6263, 6287, 6343, 6367, 6397, 6547, 6563, 6763, 6793, 8243, 8263, 8287, 8293 (list; graph; listen)
OFFSET

1,1

CROSSREFS

Cf. A083821.

Sequence in context: A048400 A110457 A090716 this_sequence A052088 A092066 A028981

Adjacent sequences: A083817 A083818 A083819 this_sequence A083821 A083822 A083823

KEYWORD

base,nonn

AUTHOR

Amarnath Murthy and Meenakshi Srikanth (amarnath_murthy(AT)yahoo.com), May 08 2003

EXTENSIONS

Corrected and extended by Ray Chandler (rayjchandler(AT)sbcglobal.net), May 20 2003

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Last modified August 19 23:53 EDT 2008. Contains 142930 sequences.


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