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 A030144 Primes in which parity of digits alternates. 18
 2, 3, 5, 7, 23, 29, 41, 43, 47, 61, 67, 83, 89, 101, 103, 107, 109, 127, 149, 163, 167, 181, 307, 347, 349, 367, 383, 389, 503, 509, 521, 523, 541, 547, 563, 569, 587, 701, 709, 727, 743, 761, 769, 787, 907, 929, 941, 947, 967, 983, 2129, 2141, 2143, 2161, 2309 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Reinhard Zumkeller, Table of n, a(n) for n = 1..10000 FORMULA A010051(a(n)) * A228710(a(n)) = 1. - Reinhard Zumkeller, Aug 31 2013 EXAMPLE 2129 is a term as 2, 1, 2 and 9 have even and odd parity alternately. MATHEMATICA Join[{2, 3, 5, 7}, Select[Prime[Range[400]], Union[Abs[Differences[Boole/@ EvenQ[ IntegerDigits[#]]]]] == {1}&]] (* Harvey P. Dale, Jul 26 2011 *) PROG (Haskell) a030144 n = a030144_list !! (n-1) a030144_list = filter ((== 1) . a228710) a000040_list -- Reinhard Zumkeller, Aug 31 2013 CROSSREFS Intersection of A000040 and A030141. Cf. A030143, A030152. Sequence in context: A106116 A091727 A240920 * A343590 A343591 A323578 Adjacent sequences:  A030141 A030142 A030143 * A030145 A030146 A030147 KEYWORD nonn,base AUTHOR EXTENSIONS Offset corrected by Reinhard Zumkeller, Aug 31 2013 STATUS approved

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Last modified August 18 02:34 EDT 2022. Contains 356204 sequences. (Running on oeis4.)