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Search: id:A154868
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| A154868 |
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Primes n such that smallest digit of prime(n) = odd and largest digit of n = odd. |
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+0
1
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| 3, 5, 7, 11, 13, 17, 23, 31, 37, 47, 53, 67, 71, 73, 89, 101, 103, 107, 109, 113, 131, 137, 139, 149, 151, 157, 167, 191, 193, 199, 227, 229, 233, 251, 257, 269, 271, 277, 293, 331, 347, 349, 353, 359, 397, 449, 457, 467, 491
(list; graph; listen)
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OFFSET
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1,1
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EXAMPLE
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If 5=prime(n=3=prime), 5=odd and 3=odd, then 3=a(1). If 11=prime(n=5=prime), 1=1=odd and 5=odd, then 5=a(2). If 17=prime(n=7=prime), 7>1=odd and 7=odd, then 7=a(3). If 31=prime(n=11=prime), 3>1=odd and 1=1=odd, then 11=a(4). If 41=prime(n=13=prime), 4>1=odd and 1<3=odd, then 13=a(5), etc.
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CROSSREFS
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Cf. A000027 and A000040.
Sequence in context: A147545 A083668 A063908 this_sequence A020628 A108816 A088503
Adjacent sequences: A154865 A154866 A154867 this_sequence A154869 A154870 A154871
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KEYWORD
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nonn
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AUTHOR
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Juri-Stepan Gerasimov (2stepan(AT)rambler.ru), Jan 16 2009
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