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 A340054 #24 Jan 03 2021 16:27:23 %S A340054 2,107,157,929,1069,1567,10007,10079,11657,11927,14897,15667,15937, %T A340054 91019,93529,93629,99689,100207,100279,100669,100699,104179,105359, %U A340054 106297,106759,108287,108649,108707,109097,109267,109297,110567,110597,111577,114377,115777 %N A340054 Prime numbers which can be expressed as the sum of two numbers, one of which is the rotationally ambigrammatic transformation of the other excluding leading zeros. %H A340054 Wikipedia, <a href="https://en.wikipedia.org/wiki/Ambigram">Ambigram</a> %e A340054 Consider the number 16. Applying a rotationally ambigrammatic transformation gives the number 91. 16 + 91 = 107. A prime. Hence 107 is part of the sequence. %e A340054 Consider the number 18. Applying a rotationally ambigrammatic transformation gives the number 81. 18 + 81 = 99. Not a prime. Hence 99 is not part of the sequence. %Y A340054 Cf. A045574 (rotationally ambigrammatic numbers), A018848. %K A340054 nonn,base %O A340054 1,1 %A A340054 _Philip Mizzi_, Dec 27 2020