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 A155053 Primes n with nonprime smallest digit of prime(n). 2
 5, 7, 11, 13, 19, 29, 31, 37, 41, 43, 47, 53, 67, 79, 83, 89, 97, 101, 113, 127, 157, 163, 167, 173, 179, 181, 191, 193, 197, 199, 211, 223, 227, 229, 233, 239, 241, 251, 257, 263, 269, 271, 277, 281, 283, 293, 307, 311, 313, 317, 331, 347, 349, 353, 359, 379, 397, 409, 421, 431, 433, 439, 443, 449, 467, 479, 491, 523, 541, 557, 563, 569, 571, 577, 601, 613, 617, 619, 641, 643, 647, 653, 673, 677, 683, 691, 701, 709, 719, 727, 743, 751, 757, 761, 769 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Vincenzo Librandi, Table of n, a(n) for n = 1..1000 EXAMPLE a(1) = 5 corresponds to the fact that the fifth prime is 11, the smallest digit of which is 1, which is nonprime. a(2) = 7: the seventh prime is 17, the smallest digit of which is 1, which is nonprime. a(3) = 11: the eleventh prime is 31, the smallest digit of which is 1, which is, again, nonprime. MATHEMATICA Select[Prime[Range[150]], !PrimeQ[Min[IntegerDigits[Prime[#]]]] &] (* Harvey P. Dale, Nov 25 2010 *) CROSSREFS Cf. A154981. Sequence in context: A180950 A112397 A081759 * A152468 A267945 A088664 Adjacent sequences:  A155050 A155051 A155052 * A155054 A155055 A155056 KEYWORD nonn,base,less AUTHOR Juri-Stepan Gerasimov, Jan 19 2009 EXTENSIONS Corrected (19 inserted, 1673 replaced by 167) by R. J. Mathar, May 05 2010 More terms from Harvey P. Dale, Nov 25 2010 STATUS approved

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Last modified May 25 04:50 EDT 2019. Contains 323539 sequences. (Running on oeis4.)