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 A097312 #21 May 08 2023 09:33:42 %S A097312 2,3,5,7,11,13,14,16,17,20,30,31,32,34,35,37,38,50,70,71,73,74,76,79, %T A097312 91,92,95,97,98,101,103,104,106,107,110,113,115,118,119,121,124,125, %U A097312 127,128,131,133,140,142,143,146,149,152,154,157,160,163,164,166,169,170 %N A097312 Numbers with property that can bring the first digit to the back of the number to get a prime (zeros are dropped). %C A097312 First differs from A095179 at a(31) = 103 since A095179(31) = 104 because 401 is prime but 301 = 7 * 43. - _Alonso del Arte_, Apr 12 2020 %H A097312 Michael S. Branicky, <a href="/A097312/b097312.txt">Table of n, a(n) for n = 1..11018</a> (all terms < 10**5) %e A097312 1234 is in the sequence because 2341 is prime. %t A097312 Select[Range[200],PrimeQ[FromDigits[RotateLeft[IntegerDigits[#]]]] &] (* _Harvey P. Dale_, Jun 06 2018 *) %o A097312 (Python) %o A097312 from sympy import isprime %o A097312 def ok(n): s = str(n); return isprime(int(s[1:]+s[0])) %o A097312 print([k for k in range(171) if ok(k)]) # _Michael S. Branicky_, May 08 2023 %K A097312 base,easy,nonn %O A097312 1,1 %A A097312 _Jason Earls_, Mar 16 2005