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 A087532 #11 Sep 20 2024 23:54:47 %S A087532 83,38383883,88838333,3338388883,3388338883,3388833883,3388838833, %T A087532 3833388883,3838383883,3838388383,3838838383,3838883383,3883883833, %U A087532 8333888383,8338383883,8338888333,8383338883,8383388383,8383888333,8388338383,8388883333,8833383883 %N A087532 Primes consisting only of digits 3 and 8 occurring with equal frequency. %C A087532 There are 18 digit pairs which can produce such primes. (1,0),(1,3),(1,4),(1,6),(1,7),(1,9),(2,3),(2,9),(3,4),(3,5),(3,7),(3,8),(4,7),(4,9),(5,9),(6,7),(7,9),(8,9). %H A087532 Andrew Howroyd, <a href="/A087532/b087532.txt">Table of n, a(n) for n = 1..5182</a> %o A087532 (PARI) \\ Needs B() from A087510. %o A087532 concat(vector(6,k,B(k,3,8,isprime))) \\ _Andrew Howroyd_, Sep 20 2024 %Y A087532 Cf. A087510, A087511, A087531. %K A087532 base,nonn %O A087532 1,1 %A A087532 _Amarnath Murthy_ and _Paul D. Hanna_, Sep 12 2003 %E A087532 Edited by _Charles R Greathouse IV_, Oct 28 2009 %E A087532 Offset changed and a(20) onwards from _Andrew Howroyd_, Sep 20 2024