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 A112419 #13 Aug 13 2020 14:02:28 %S A112419 127,347,2503,12101,12107,12109,15629,15641,15661,15667,15679,16381, %T A112419 16447,16759,16879,19739,21943,27653,28547,28559,29527,29531,32771, %U A112419 32783,35933,36457,39313,39343,43691,45361,46619,46633,46643,46649,46663,46691,48751,48757,49277,58921,59051,59053,59263,59273,64513,74353,74897,78163,83357 %N A112419 Prime Friedman numbers. %C A112419 A Friedman number is one which is expressible in a nontrivial manner with the same digits by means of the arithmetic operations +, -, *, "divided by" along with ^ and digit concatenation. %C A112419 Ron Kaminsky notes that, by Dirichlet's theorem, this sequence is infinite; see Friedman link. - _Charles R Greathouse IV_, Apr 30 2010 %C A112419 There are only 49 terms below 10^5, and there are less than 40 "orderly" terms (in A080035) below 10^6. - _M. F. Hasler_, Jan 03 2015 %H A112419 Erich Friedman, <a href="https://erich-friedman.github.io/mathmagic/0800.html">Problem of the Month (August 2000)</a>. %F A112419 Intersection of A036057 and A000040. - _M. F. Hasler_, Jan 03 2015 %e A112419 Since the following primes have expressions 16381 = (1+1)^(6+8) - 3 ; 16447 = -1+64+4^7 ; 16759 = 7^5 - 6*(9-1), they are in the sequence. %Y A112419 Cf. A036057. %K A112419 nonn,base %O A112419 1,1 %A A112419 _Lekraj Beedassy_, Jan 23 2007 %E A112419 Corrected and extended by _Ray Chandler_, Apr 24 2010