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 A260270 #11 Jul 14 2025 17:33:11
%S A260270 11,41,181,811,881,1181,1481,1811,4111,4441,4481,8111,11411,14411,
%T A260270 18181,18481,41141,41411,44111,48481,81181,84181,84481,84811,88411,
%U A260270 88811,118411,141181,141481,141811,144481,148411,181141,184111,184181,184441,411841,418181
%N A260270 Primes having only {1, 4, 8} as digits.
%C A260270 A020452 and A020456 are subsequences.
%H A260270 Alois P. Heinz, <a href="/A260270/b260270.txt">Table of n, a(n) for n = 1..10000</a>
%t A260270 Select[Prime[Range[4 10^4]], Complement[IntegerDigits[#], {1, 4, 8}]=={} &]
%t A260270 Table[Select[10#+1&/@(FromDigits/@Tuples[{1,4,8},n]),PrimeQ],{n,5}]// Flatten (* _Harvey P. Dale_, Jun 08 2019 *)
%o A260270 (Magma) [p: p in PrimesUpTo(5*10^5) | Set(Intseq(p)) subset [1, 4, 8]];
%Y A260270 Cf. similar sequences listed in A260266.
%Y A260270 Cf. A020452, A020456.
%K A260270 nonn,easy,base
%O A260270 1,1
%A A260270 _Vincenzo Librandi_, Jul 23 2015