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 A138359 #6 Apr 11 2022 22:08:35
%S A138359 44449,44453,44483,44491,120811,120817,120823,120829,315037,315047,
%T A138359 315059,315067,583069,583087,583127,583139,617411,617429,617447,
%U A138359 617453,1553423,1553429,1553437,1553467,1712329,1712339,1712353,1712369
%N A138359 List of quadruples of strictly non-palindromic primes without an ordinary prime in between them.
%C A138359 For triples of this kind, see A138358.
%C A138359 For quintuples of this kind, see A138360.
%D A138359 Karl Hovekamp, Palindromzahlen in adischen Zahlensystemen, 2004
%H A138359 K. Hovekamp, <a href="http://free.pages.at/neuenkirchen/palindrom/">Palindromic numbers in different bases</a>.
%H A138359 K. Hovekamp, <a href="http://free.pages.at/neuenkirchen/palindrom/bilder/prime/tupelx.txt">Strictly non-palindromic prime 5-tuple, quadruple and triple up to 1 billion</a>
%H A138359 Wikipedia, <a href="http://en.wikipedia.org/wiki/Strictly_non-palindromic_numbers">Strictly non-palindromic numbers</a>.
%e A138359 Primes:
%e A138359 ...
%e A138359 44417 palindromic in bases 50, 106, 135 and 141
%e A138359 44449 strictly non-palindromic
%e A138359 44453 strictly non-palindromic
%e A138359 44483 strictly non-palindromic
%e A138359 44491 strictly non-palindromic
%e A138359 44497 palindromic in base 67 and base 206
%e A138359 ...
%e A138359 So {44449, 44453, 44483, 44491} is the first quadruple of strictly non-palindromic primes.
%Y A138359 Cf. A138358, A138360, A138329, A016038, A047811, A016038.
%K A138359 base,nonn,tabf
%O A138359 1,1
%A A138359 _Karl Hovekamp_, Mar 16 2008