This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A030144 #11 Nov 21 2013 12:46:28
%S A030144 2,3,5,7,23,29,41,43,47,61,67,83,89,101,103,107,109,127,149,163,167,
%T A030144 181,307,347,349,367,383,389,503,509,521,523,541,547,563,569,587,701,
%U A030144 709,727,743,761,769,787,907,929,941,947,967,983,2129,2141,2143,2161,2309
%N A030144 Primes in which parity of digits alternates.
%H A030144 Reinhard Zumkeller, <a href="/A030144/b030144.txt">Table of n, a(n) for n = 1..10000</a>
%F A030144 A010051(a(n)) * A228710(a(n)) = 1. - _Reinhard Zumkeller_, Aug 31 2013
%e A030144 2129 is a term as 2, 1, 2 and 9 have even and odd parity alternately.
%t A030144 Join[{2,3,5,7},Select[Prime[Range[400]],Union[Abs[Differences[Boole/@ EvenQ[ IntegerDigits[#]]]]] == {1}&]] (* _Harvey P. Dale_, Jul 26 2011 *)
%o A030144 (Haskell)
%o A030144 a030144 n = a030144_list !! (n-1)
%o A030144 a030144_list = filter ((== 1) . a228710) a000040_list
%o A030144 -- _Reinhard Zumkeller_, Aug 31 2013
%Y A030144 Intersection of A000040 and A030141.
%Y A030144 Cf. A030143, A030152.
%K A030144 nonn,base
%O A030144 1,1
%A A030144 _Patrick De Geest_
%E A030144 Offset corrected by _Reinhard Zumkeller_, Aug 31 2013