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 A227409 #21 Dec 07 2015 01:03:11
%S A227409 10103,10111,10133,10139,10141,10151,10159,10163,10169,10177,10181,
%T A227409 10193,10211,10223,10243,10247,10253,10259,10267,10271,10273,10289,
%U A227409 10301,10303,10313,10321,10331,10333,10337,10343,10357,10369,10391,10399,10427,10429,10433
%N A227409 Prime numbers representing a date in "condensed American notation" MMDDYY.
%C A227409 For February, the number of days will be 28 only, as the year cannot be a leap year if MMDDYY is to be a prime number.
%C A227409 The sequence is finite, with 3379 terms. The largest term is a(3379)=123191.
%H A227409 Shyam Sunder Gupta, <a href="/A227409/b227409.txt">Table of n, a(n) for n = 1..3379</a>
%e A227409 a(1)=10103 is prime and represents a date in MMDDYY format as 010103.
%t A227409 t = {}; Do[If[m < 8, If[OddQ[m], b = 31, If[m == 2, b = 28, b = 30]],If[OddQ[m], b = 30, b = 31]]; Do[a = 100 d + y + 10000 m;If[PrimeQ[a], AppendTo[t, a]], {d, 1, b}], {m, 1, 12}, {y, 1, 99}]; Union[t]
%Y A227409 Cf. A227407, A213184.
%K A227409 nonn,base,fini,full,less
%O A227409 1,1
%A A227409 _Shyam Sunder Gupta_, Sep 22 2013