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A154813
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Primes p such that the largest decimal digit of p + the smallest digit of prime(p) is a prime.
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0
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2, 11, 41, 43, 59, 101, 127, 173, 211, 223, 241, 263, 307, 311, 313, 317, 389, 419, 487, 557, 601, 613, 617, 619, 647, 673, 677, 727, 739, 751, 757, 761, 827, 839, 853, 857, 883, 929, 953, 971, 1013, 1021, 1033, 1039, 1061, 1091, 1103, 1109, 1123, 1151, 1181
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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MAPLE
| nmax := proc (n) local nn: nn := convert(n, base, 10): max(seq(nn[j], j = 1 .. nops(nn))) end proc: nmin := proc (n) local nn: nn := convert(n, base, 10): min(seq(nn[j], j = 1 .. nops(nn))) end proc: a := proc (n) if isprime(n) = true and isprime(nmax(n)+nmin(ithprime(n))) = true then n else end if end proc: seq(a(n), n = 1 .. 1300); [From Emeric Deutsch (deutsch(AT)duke.poly.edu), Jan 27 2009]
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MATHEMATICA
| Select[Prime[Range[200]], PrimeQ[Max[IntegerDigits[#]]+Min[ IntegerDigits[ Prime[ #]]]]&] (* From Harvey P. Dale, Sep 23 2011 *)
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CROSSREFS
| Sequence in context: A152895 A176621 A000822 * A168367 A080093 A175447
Adjacent sequences: A154810 A154811 A154812 * A154814 A154815 A154816
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KEYWORD
| nonn,base,less
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AUTHOR
| Juri-Stepan Gerasimov (2stepan(AT)rambler.ru), Jan 15 2009, Jan 16 2009
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EXTENSIONS
| Corrected (added 101, 223, 853; removed 233, 239, 811) and extended by Emeric Deutsch (deutsch(AT)duke.poly.edu), Jan 27 2009
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