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Search: id:A157175
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| A157175 |
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Primes such that sum of first digit and smallest digit is a prime. |
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+0
2
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| 11, 13, 17, 19, 41, 43, 61, 83, 113, 127, 131, 137, 139, 149, 151, 157, 163, 167, 173, 179, 181, 191, 193, 197, 199, 211, 241, 251, 271, 281, 307, 419, 421, 431, 433, 439, 443, 461, 463, 491, 503, 509, 523, 613, 617, 619, 631, 641, 659, 661, 691, 701, 709
(list; graph; listen)
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OFFSET
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1,1
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EXAMPLE
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11(1+1=2=prime), 13(1+1=2=prime), 17(1+1=2=prime), 19(1+1=2=prime), 41(4+1=5=prime), 43(4+3=7=prime), etc.
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CROSSREFS
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Cf. A000040.
Sequence in context: A164329 A159236 A068155 this_sequence A132244 A087201 A068492
Adjacent sequences: A157172 A157173 A157174 this_sequence A157176 A157177 A157178
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KEYWORD
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nonn,base,less
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AUTHOR
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Juri-Stepan Gerasimov (2stepan(AT)rambler.ru), Feb 24 2009
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EXTENSIONS
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197 and 241 inserted by R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Feb 26 2009
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