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 A245808 #26 Nov 03 2019 12:05:47 %S A245808 2,3,5,7,11,14,16,19,23,29,32,34,35,38,41,43,47,53,59,61,67,74,76,83, %T A245808 89,91,92,95,98,101,103,104,106,109,110,112,115,121,130,134,140,143, %U A245808 145,151,154,160,166,188,190,211,223,227,229,232,233,235,236,253,257,263,269,272,275,278,287,289,292 %N A245808 Monoprimatic permutable numbers: Numbers whose decimal digits can be arranged to form exactly one prime number. No leading zeros. %C A245808 The sequence takes a surprisingly large number of computations to generate since the number of permutations rises quickly with the number of digits. Generating the sequence is an excellent programming exercise since there are several approaches to calculate the same sequence. Regardless of approach, there are many ways to optimize the algorithms, so the sequence would be a good choice of assignment for a contest between programmers. The assignment also has some pitfalls, mainly due to the problem of how to handle leading zeros. %C A245808 The sequence was originally explored for the development of two puzzles found in the science fiction novel "The Right Left" by Andreas Boe. %D A245808 Andreas Boe, The Right Left, Amazon books, 2014. %H A245808 Andreas Boe, <a href="/A245808/b245808.txt">Table of n, a(n) for n = 1..9596</a> %e A245808 190 -> 019 (forbidden), 091 (forbidden), 109 (prime), 190 (even), 901 (composite), 910 (even) -> Conclusion: One prime number. %Y A245808 Cf. A246044 (Monoprimatic permutable primes), A246043 (Biprimatic permutable numbers), A246045 (Biprimatic permutable primes). %K A245808 nonn,base %O A245808 1,1 %A A245808 _Andreas Boe_, Aug 22 2014